DNA polymerases are processive, which means that they remain tightly associated with the template strand while moving rapidly and adding nucleotides to the growing daughter strand. Which piece of the replication machinery accounts for this characteristic?
A) Helicase
B) Sliding clamp
C) Single-strand binding protien
D) Primase
Answer:
B) Sliding clamp
Explanation:
Sliding clamp holds the DNA polymerase and does not allow the enzyme to dissociate from the template strand. For example, beta subunit of E coli DNA polymerase III increases its processivity.
Two donut-shaped structures are formed by four beta subunits. These structures encircle the DNA and serve as a clamp while sliding along the DNA to prevent dissociation of DNA polymerase as the replication proceeds.
Why is dna replication essential to the cell cycle
Answer:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
Explanation:
Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
DNA replication is a vital process in the cell cycle because it enables cell division, ensuring that each new daughter cell receives an exact genetic copy from the parent cell. This is carefully regulated and monitored through cell cycle checkpoints to prevent DNA replication errors, which could lead to harmful mutations and diseases like cancer. Thus, DNA replication plays a critical role in maintaining cellular and genetic integrity.
Explanation:DNA replication is essential to the cell cycle because it allows the cell to divide and produce two new daughter cells, each containing an identical copy of the DNA from the parent cell. This process of DNA replication takes place during the synthesis phase, or S phase, of the cell cycle, preceding mitosis or meiosis. This is crucial for maintaining the continuity of life and ensuring that each new cell has the precise genetic information to function correctly.
Cell cycle checkpoints serve as internal control mechanisms that help prevent any missteps in DNA replication, halting cell cycle progression until favourable conditions are met. Therefore, incorrect DNA replication can lead to mutations, which may result in abnormal cells. If such cells continue to divide, they can lead to harmful effects like cancer.
In essence, DNA replication is a fundamental process that validates the accuracy of genetic information passed on from parent to daughter cells, promotes healthy cell growth and division, and maintains an organism's overall health by replacing old or damaged cells with new ones. It is intricately regulated and monitored to ensure the preservation of life at a cellular level.
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Which statement provides the best description of the interphase portion of the cell cycle?- Interphase is a resting stage prior to cell division.- During interphase, a cell is metabolically active.- Interphase is a brief period between mitosis and chromosome duplication.
Answer:
During interphase, a cell is metabolically active
Explanation:
Cell cycle is divided into two stages: interphase (lasts 3/4 of the cycle) and phase M (1/4 of the cycle).
Interphase is also divided into three stages:
Phase G1
Protein and RNA synthesis is done.
Phase S
DNa synthesis is done.
Phase G2
Protein synthesis continues and the cell grows to start the division.
Bilaterally symmetrical animals tend to have all of the following except:Question 4 choicesChoice A., a distinct head and tail end.Choice B., one plane of symmetry running from head to tail.Choice C., sensory organs concentrated in the head.Choice D., poorly developed organ systems.
Answer:
Bilaterally symmetrical animals tend to have all of the following except: poorly developed organ systems.- Choice D.
What is the average airspeed velocity of an unladen swallow
Answer:
10 meters/second.
Explanation:
Unladen swallow consists of two species are Hirundo domicella and the Hirundo spilodera.
The average speed of unladen swallow comes out to be 10 meters/second. The maximum speed can go upto 13-14 meters/second. The speed of unladen swallow can be calculated by the formula given by Graham K. Taylor. According to graham the speed of unladen swallow is 3 times of the product of frequency and amplitude. ( v= 3fA, v is velocity, f is frequency and A is amplitude).
Prokaryotic organisms have a single origin of replication, whereas eukaryotic organisms have many origins where replication occurs simultaneously. Which of the following is the most probable reason for this observation?
Prokaryotes do not replicate their DNA.
Prokaryotic DNA is single-stranded.
Prokaryotic DNA is much smaller than eukaryotic DNA.
Prokaryotic DNA is replicated more slowly than eukaryotic DNA.
Answer:
Prokaryotic DNA is much smaller than eukaryotic DNA.
Explanation:
Origin of replication is the site on DNA where DNA replication can be started. Eukaryotes have a larger DNA than that of prokaryotes. The larger DNA size of eukaryotes poses the need of multiple origin of replications. DNA replication can begin simultaneously on these multiple origin of replication sites. This allows the larger eukaryotic DNA to get replicated quickly.
Smaller DNA of prokaryotes can be replicated with single origin of replication.
How does the egg of a flower become fertilized?
as soon as the pollen reaches the stigma
after the pollen grain descends down the style
when the pollen tube grows into the ovule
when the seed germinates
Answer:
When the pollen tube grows into the ovule
Explanation:
Simmilar to animals, fertilization occurs when the egg (ovule) and the sperm join together to produce a new individual. In flowers, when the pollen tube grows into the ovlue is when pollen and ovule join together and fertilization occurs. A new seed is the produced, ready to produce a new individual.
Transcription initiation of the lac operon is enhanced when _______ interacts with rna polymerase.
Answer: lac operon is enhanced when CAP-cAMP complex interacts with rna polymerase.
Explanation:
The operon is defined as a set of structural genes organized in sequence and under the control of a single promoter. RNA polymerase transcribes, from the common promoter, all the structural genes into a single polycistronic RNA molecule, which is translated into the proteins encoded by the genes.
The CAP-cAMP Complex acts positively by providing the basic conditions for transcription. The complex binds to the lac promoter and doubles the DNA of this region, which allows it to be recognized by the RNA polymerase. In the absence of cAMP or CAP protein, the process of transcription does not occur because the RNA polymerase does not recognize the Lac promoter. When the CAP-cAMP complex is present, the promoter is recognized by the RNA polymerase, which binds to it. The CAP protein is, therefore, an activator and the cAMP an effector.
What are the effects of fertilizer input into lakes?
Answer:
fertilizers leads to algal blooms that eventually deplete lake oxygen
The effects of fertilizer input into lakes are they cause toxic algal blooms that affect aquatic life and humans.
What are fertilizers?To encourage development and productivity, fertilizer—a natural or synthetic substance—is added to the soil or plants. They provide nutrients to the plants. Examples include urea and anhydrous ammonia.
A plant can really die from too much fertilizer, and excess fertilizer can cause toxic algal blooms in lakes and streams that are dangerous to people and their pets, as well as other aquatic life.
Aquatic "dead zones" are also a result of excessive fertilizer runoff from agricultural and lawn applications in coastal areas.
Therefore, the input of fertilizer into lakes results in toxic algal blooms that are harmful to both humans and aquatic life.
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What types of antigen do T cells NOT recognize? What types of antigen do T cells NOT recognize? self-antigens bacterial antigens cancer antigens processed fragments of protein antigens displayed on surfaces of body cells
Answer:
Self-antigens are not recognized and attacked by the T cells.
Explanation:
In immunology, the antigens are those substances which are bound by the antibodies. The antigens can be originated from within the bodies, known as self antigens or from outside the body, known as non-self antigens. The immune system identifies and attacks non-self invaders or the foreign harmful objects present in the body. It does not attack the self-antigens under the normal conditions. This is due to the negative selection of T cells of the thymus.
T cells, developed in the thymus, recognize antigens through an antigen receptor on their surface. They do not recognize self-antigens, but only processed antigens presented on their surface. This understanding is crucial in dealing with organ transplantation and cancer treatment as T cells discern between self and non-self antigens.
Explanation:They are unable to recognize self-antigens, but only processed antigen displayed on the surface in a major histocompatibility complex molecule. This learning process cultivates tolerance to self-antigens.
There are many functional types of T cells including helper, regulatory, and cytotoxic T cells. Each of these T lymphocytes plays a distinct role in mounting an immune response against foreign bodies and pathogens. Interestingly, T cells do not engage with antigens in the same way as B cells. Unlike T cells, B cells can recognize native, unprocessed antigen and do not need the involvement of MHC molecules and antigen-presenting cells.
In practical terms, the ability of T cells to distinguish between self and non-self antigens is crucial in conditions such as organ transplantation and cancer treatment. For instance, a transplanted organ may be rejected as body's immune system can identify it as foreign due to its non-self antigens. Similarly, in the case of cancer, cellular antigens often change, which enables the immune system to identify and destroy cancerous cells.
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Goblet cells of the respiratory tract produce a physical barrier called (BLANK)
Real answers please.
I believe the correct answer is mucus.
Explanation:In the respiratory tract, there exist hairs called cilia that ensure anything entering the tract is moved out through a wavelike movement. To assist them, mucus is produced in pits of specific cells called goblet cells.
Further Explanation:The mucus traps dust and other large particles that might cause physical harm to the soft tissue of the linings of the respiratory tract. The mucus starts all the way from the mouth to the nasal cavities, the trachea, bronchi, bronchioles and the lungs. Goblet cells are just but specialized epithelial cells that are usually found in every hollow surface in the body and are non keratinized. These goblet cells are not only found in the respiratory tract but every surface of the gastrointestinal tract. In the stomach, they are very essential since they protect the stomach from corroding itself because it secretes hydrochloric acid that has a pH of 2.3 which is very acidic. It also lubricates the gastrointestinal tract to ensure the smooth movement of food from the mouth to the anus as it is being digested.
Which part of a seed grows into a root and which plant part acts as a protective covering for a seed during seed dormancy? The part of a seed grows into a root and the acts as a protective covering for a seed during seed dormancy.
Answer:
The part of a seed grows into a root: Radicle
The part that acts as a protective covering for a seed during seed dormancy: Seed coat.
Explanation:
The seed of the plants carries embryo in it. The part of the embryo that serves as the embryonic root is called radicle. Once the conditions become favorable for growth and the seed germinates on suitable substratum, the radicle enlarges and gives rise to roots.
The seed coat is the part of the seed that protects the embryo from any injury during the seed dormancy. The seed coat is derived from the outer most covering, that is integuments of the ovule after fertilization.
If Larry is taught new information about an elephant, which is a large animal, he will benefit from using ___________ about other large animals to store that new information so he can retrieve that information when he needs it.
Answer:
schemas
Explanation:
If Larry is taught new information about an elephant, which is a large animal, he will benefit from using schemas about other large animals to store that new information so he can retrieve that information when he needs it.
He will benefit from using schemas about other large animals.
Schemas are units of understanding that can be hierarchically categorized as well as webbed into complex relationships with one another.What is the benefit of using Schemas?Schemas can be useful because they allow to take shortcuts in interpreting the vast amount of information that is available in environment. These mental frameworks also cause to exclude pertinent information to focus instead only on things that confirm pre existing beliefs and ideas.
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Which of the following does not accurately describe movement within plants? A. Cohesion and adhesion contribute to capillary action, which contributes to water movement. B. Transpiration is the only force that drives water movement within a plant. C. Changes in the concentration of nutrients affect the cause of movement of fluid through phloem. D. Movement of sugars within the xylem results from changes in concentration of water.
Transpiration is the only force that drives water movement within a plant does not accurately describe movement within plants.
Answer: Transpiration is the only force that drives water movement within a plant -B.
Which of the following describes the ability of a single gene to have multiple phenotypic effects?
A) pleiotropy
B) incomplete dominance
C) epistasis
D) multiple alleles
E) none of the abov
Answer:
A, pleiotropy.
Explanation:
Pleiotropy - genes that have multiple phenotypic effects. Remember that phenotype means a physical characteristic caused by a gene, such as eye color or fur patterns.
Incomplete dominance - when neither allele is dominant and they mix together in the phenotype. A popular example is a red flower crossing with a white flower and resulting in a pink flower.
Epistasis - when two genes contribute to the phenotype, but one gene completely masks another gene. An example would be labrador fur colors.
Multiple alleles - 3 or more alternative forms of a gene, but only 2 alleles can occupy an organism. An example is blood type.
Hope this helps!
Final answer:
Pleiotropy is the term that describes the ability of a single gene to have multiple phenotypic effects. An example of this is sickle cell anemia, where mutations in a single gene result in various symptoms and health effects.
Explanation:
The term that describes the ability of a single gene to have multiple phenotypic effects is pleiotropy. Pleiotropy can result in multiple, seemingly unrelated physical traits or effects caused by a single allele. A classic example of pleiotropy in humans is the case of sickle cell anemia, where mutations in the hemoglobin B gene not only cause changes in red blood cells but also lead to symptoms such as anemia, pain, and increased risk of infection.
Other terms like incomplete dominance and codominance refer to the expression of two different alleles in the phenotype, while epistasis refers to the interaction of different genes where one gene can mask or modify the effect of another. A trait controlled by more than two alleles is described as having multiple alleles, like the ABO blood group antigens.
Which of the following is true regarding saturated fatty acids?
A) They are the predominant fatty acid in corn oil.
B) They have double bonds between carbon atoms of the fatty acids.
C) They are the principal molecules in lard and butter.
D) They are usually liquid at room temperature.
E) They are usually produced by plants.
Answer:
C) They are the principal molecules in lard and butter.
Answer:
C) They are the principal molecules in lard and butter.
Explanation:
Saturated fatty acids have only single bonds between their carbon atoms. The absence of double bonds make their breakdown more difficult hence they are more stable and can be stored for a longer time. They are also solid at room temperature.
Lard and butter are produced by hydrogenation of oils. The double bonds in oil are broken into single bonds and valency is completed using hydrogen atoms. Hence lard and butter consist of single bond saturated fatty acids
Which kingdom contains organisms that are multicellular
Answer:
the kingdom animalia contains the organisms that r multicellular
During which phase of mitosis does the nuclear envelope re-form?
Answer:
In which phase of mitosis do chromosomes align at the center and spindle fibers become visible? Explanation: Mitosis involves four distinct stages: prophase, metaphase, anaphase, and telophase. Prophase is the first step of mitosis, during which chromosomes condense and the nuclear envelope dissolves.
The nuclear envelope re-forms during the telophase phase of mitosis. It's in this phase that the chromosomes decondense, mitotic spindles are broken down and the nuclear envelopes form around the chromosomes.
Explanation:The nuclear envelope re-forms during the telophase phase of mitosis. This phase is also referred to as the "distance phase," where the chromosomes reach the opposite poles and begin to decondense or unravel, relaxing into a more stretched-out chromatin configuration. The mitotic spindles are broken down into tubulin monomers that will be used to assemble cytoskeletal components for each daughter cell.
Finally, nuclear envelopes form around the chromosomes and nucleosomes appear within the nuclear area, signaling the end of mitosis, and the beginning of cytokinesis, the process of physical separation of the cytoplasmic components into two daughter cells.
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Due to its system of nine air sacs connected to the lungs, the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi. If Archaeopteryx had air sacs, then which of its features would have had the opposite effect on enabling Archaeopteryx to fly long distances from that provided by air sacs?
Answer:
The respiratory system of birds is arguably the most effective respiratory system of all air-breathers
the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.
Explanation:
Dr. Jones is a brain researcher who studies the relationship between personality and brain development. He is asked to evaluate the brain of an individual who scored high on conscientiousness. Compared with the brains of those who score low on this trait, Dr. Jones would expect the individual's _____ lobe to be larger.
Answer:
frontal
Explanation:
In the frontal lobe, located at the front of the brain (forehead), happens the planning of actions and movement, as well as abstract thinking. It includes the motor cortex and the prefrontal cortex.
The motor cortex controls and coordinates voluntary motricity, while the motor cortex of the right hemisphere controls the left side of the individual's body, while that of the left hemisphere controls the right side. Trauma to this area can cause muscle weakness or paralysis. Motor learning and precision movements are performed by the premotor cortex, which becomes more active than the rest of the brain when imagining a movement without performing it. Injuries in this area do not compromise to the point of paralysis or problems in planning or acting, however the speed of automatic movements, such as speech and gestures, is disturbed.
The frontal lobe of individuals with a high level of consciousness is generally larger than that of individuals with a low level of conscientiousness.
Conscientiousness is a dimension that can be described as the tendency to control impulses and act in a socially acceptable manner. These are characteristics that facilitate the achievement of personal goals and objectives.
Loss of lung tissue elasticity is characteristic of
The loss of lung tissue elasticity is a hallmark of emphysema, a respiratory disease. The air sacs' elasticity loss results in difficulty with exhalation and a feeling of breathlessness.
Explanation:The loss of lung tissue elasticity is a primary characteristic of a respiratory disease called emphysema. When we breathe in, our lungs expand due to the elasticity of the lung tissues. But in emphysema, this elasticity is lost which makes exhalation difficult. This happens because the walls of the air sacs (alveoli) are damaged and hence, they lose their elasticity making it harder for the air to get out. Consequently, this leaves a residual volume of air in the lungs and gives a feeling of breathlessness to the patients suffering from this disease. Emphysema is primarily caused by long-term exposure to irritants like smoking and air pollution.
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The loss of lung tissue elasticity is a characteristic symptom of obstructive diseases like emphysema and asthma, as well as restrictive diseases like respiratory distress syndrome and pulmonary fibrosis. This decreased elasticity leads to trapping more air in the lungs after exhalation, and the lung tissues becoming less compliant and more stiff or fibrotic.
Explanation:The loss of lung tissue elasticity is characteristic of obstructions and diseases such as emphysema or asthma. Emphysema results predominantly from smoking tobacco, where the alveoli walls are destroyed, thus decreasing the surface area for gas exchange. This destruction increases lung compliance as the alveolar walls become damaged and lung elastic recoil decreases due to the loss of elastic fibers. As a consequence, more air is trapped in the lungs at the end of exhalation.
In asthma, inflammation hinders the airways, possibly due to edema (fluid accumulation), spasms in the bronchioles' muscle walls, increased mucus secretion, epithelia damage, or a combination of these elements. Those who have obstruction diseases like asthma trap significant volumes of air after exhaling and tend to breathe at a very high lung volume, compensating for lack of airway recruitment.
The loss of lung tissue elasticity, leading to the lungs becoming increasingly stiff and less pliable, is also observed in restrictive diseases such as respiratory distress syndrome and pulmonary fibrosis. Here, airways are less compliant and are recognized as being stiff or fibrotic due to a decrease in compliance as the lung tissue cannot bend and move as required.
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Most of the normal microbiota of the digestive system are found in the
Answer: Large intestine.
Explanation:
There are some common misconception that all the bacteria can cause disease. They play an important role in the digestion of food.
The large intestines is the home for many different types of bacteria which helps in the absorption, excretion and catalysis of undigested food.
There are many types of prokaryotic and eukaryotic bacteria found in large intestine such as Methanogens, Bifidobacterium,Enterococcus, Clostridium et cetera.
What is the function of the structure identified by the red arrow?
A. Genetic Information
B. Mobility
C. Food capture
D. Protection
Answer:
A but i am not sure.....
Enzymes are usually proteins. Based on what you know about how proteins are made, how would a cell make more of a particular enzyme in order to increase the concentration of that particular enzyme?
Cell signalling pathways are used to maintain homeostasis. Enzymes are normally present in adequate concentrations but whenever the need for a particular enzyme or protein arises, cell signalling is used.
Signal is sent to that particular cell, the process of genetic expression is activated. A gene that codes for that particular protein(enzyme of interest) goes through transcription, where that genes DNA is copied to make a messenger RNAmolecule, which is further expressed by a process called Protein expression. Lastly, transported to that particular area where it is needed.
A cell synthesizes more of a particular enzyme by initiating protein synthesis, which involves the transcription of the DNA sequence into mRNA and translation of the mRNA sequence assembling the specific amino acids into a protein chain. Once the protein is formed, the chain undergoes folding to become the particular enzyme. The cell regulates the synthesis of enzymes as needed.
Explanation:A cell increases the concentration of a particular enzyme by creating more of the protein that functions as that enzyme. As enzymes are proteins, composed largely of chains of amino acids, the cell needs to initiate protein synthesis to produce more of a given enzyme. Protein synthesis is a process that involves transcription (where the DNA sequence is copied into mRNA) and translation (where the mRNA sequence is used to assemble amino acids into a protein chain). Each enzyme is specific to the substrate it acts on and catalyzes a specific biochemical reaction.
The process begins in the cell's nucleus, where a section of DNA carrying the gene for the enzyme is copied in a process called transcription. Ribosomes, which are found on the Endoplasmic Reticulum, then use this mRNA template to assemble a chain of amino acids in the correct sequence; this process is called translation. After the protein is synthesized, it undergoes folding into a specific three-dimensional structure, which determines its enzymatic activity. The number of enzyme molecules a cell synthesizes can be regulated as required by the cell, thereby increasing or decreasing the concentration of a particular enzyme.
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Which of the following does not describe a function of aggressive animal behavior?
A. Aggressive behavior is displayed to establish territorial boundaries.
B. Aggressive behavior leads to fights that allow strong animals kill off weaker members of the species.
C. Aggressive behavior is displayed to establish hierarchy without violence.
D. Aggressive behavior is displayed to determine who is allowed to mate.
"The correct option is C. Aggressive behavior is displayed to establish hierarchy without violence. The statement that does not describe a function of aggressive animal behavior is aggressive behavior is displayed to establish hierarchy without violence.
Aggressive animal behavior serves several functions within a species, including establishing territorial boundaries (Option A), allowing stronger animals to potentially kill off weaker members of the species through fights (Option B), and determining which individuals are allowed to mate (Option D). These behaviors are typically associated with the survival and reproduction of the species.
However, Option C, Aggressive behavior is displayed to establish hierarchy without violence, is not a typical function of aggressive behavior. Aggressive behavior, by definition, involves actions that are intended to cause harm or intimidate. When animals establish hierarchy within a group, they may engage in displays or posturing that appear aggressive, but these behaviors are often ritualized and do not necessarily lead to violence. The purpose of these displays is to avoid the costs associated with actual fighting, such as injury or death. Therefore, establishing hierarchy without violence is more accurately described as a way to prevent unnecessary aggression rather than a function of aggressive behavior itself."
Which of the following molecules found in skeletal muscle cells binds oxygen that can later be used during aerobic metabolism to help generate ATP?
a.myoglobin
b.creatine
c.creatine phosphate
d.titin
e.glycogen
Answer: a.myoglobin
Explanation:
Myoglobin (Mb) and Hemoglobin (Hb) are heme proteins and are part of the family of globular proteins. These proteins are characterized by having the spherical or globular wrapped polypeptide chain having various types of secondary structures. Myoglobin is an extremely compact protein found in muscular cells of vertebrate animals, having as their main function the storage and it also facilitates the transport of oxygen in the muscles. This protein is found in the cardiac muscle and skeletal muscle of the mammals and increases the effective solubility of oxygen in the muscle by acting as an oxygen reservoir and facilitating the diffusion of O2 from the capillaries blood to the mitochondria.
The molecule that binds oxygen in skeletal muscle cells, aiding in aerobic ATP production, is myoglobin.
Explanation:The molecule found in skeletal muscle cells that binds oxygen, which can then be used during aerobic metabolism to help generate ATP, is myoglobin. Myoglobin is essential for oxygenating musculature during strenuous activities when the blood oxygen delivery might be limited. In contrast, creatine phosphate serves as a quick energy reservoir by donating a phosphate group to ADP to regenerate ATP, which is critical during the initial phases of muscle contraction. However, it does not bind oxygen. Glycogen is a form of energy storage that can be broken down to glucose for ATP production primarily through glycolysis, which is useful if oxygen is in short supply.
Why are the male testes located in the scrotum, outside the body? (A) Their external location is necessary for penile development.(B) The testes develop better outside the body.(C) It helps the male secondary sexual characteristics develop.(D) Spermatogenesis is temperature sensitive.
The testes are located in the scrotum outside the body mainly because it requires a cooler temperature for the efficient production of sperm, a process called spermatogenesis.
Explanation:The male testes are located in the scrotum, a pouch outside the body, primarily because of the need for a temperature lower than the body's internal temp for spermatogenesis (the process of sperm production) to occur efficiently. In fact, the optimal temperature for spermatogenesis is about 2-4 degrees Celsius below the body’s average temperature. This is why, when exposed to cold conditions, the scrotal muscles contract to bring the testes closer to the body for warmth, whereas in hotter conditions they relax, allowing the testes to stay cool. Therefore, option (D) is the most accurate.
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Which of the following is formed when a group of tissues works together to perform a common function?
A. Brain
B. Organ system
C. Body
D. Organ
Answer:
D: Organ
Since it consist of multiple tissue that perform a function by working together
Tina suffers from anorexia nervosa. She is depressed and lacks self-confidence. Though she is extremely thin, she continues to lose weight at a rapid rate. Based on this information, the most important FIRST step in treating Tina will be to:
Answer:
Stabilize her weight.
Explanation:
Anorexia nervosa may be defined as the medical condition in which individual loses his weight with the growing age. This is a type of eating disorder, that can distort the body image of an individual.
Tina is extremely thin and continuously loosing her weight. The first treatment that can be given to Tina is the stabilization of her weight. The healthy food with proper balanced diet and proper medication is helpful for Tina to stabilize her weight.
For gas exchange to be efficient, the respiratory membrane must be ________.
A. 0.5 to 1 micrometer thick
B. between 5 and 6 micrometers thick
C. at least 3 micrometers thick
D. The thickness of the respiratory membrane is not important in the efficiency of gas exchange.
Answer:
A- 0.5 to 1 micrometer thick
Explanation:
During gaseous exchange, the oxygen moves through the respiratory membrane into the blood and the carbon dioxide travels through the respiratory membrane out of the blood. The thickness of the respiratory membrane should be about 0.6 micrometers. A thicker membrane would result in slower and decreased gaseous exchange.