The brain, heart and the skeleton are the integral parts of the nervous system, circulatory system and the skeletal system respectively. The nervous system is made of the brain and the spinal cord with neurons as the structural and functional units of it. The circulatory system is made up of the heart and its blood vessels. The skeletal system is made up of the bones and cartilages making the skeleton of the body.
The brain regulates the heart beat and the blood pressure. The heart nourishes the brain with oxygen and nutrients by pumping blood. The bone cells are nourished by the blood pumped by the heart. The bone marrow of the skeleton produces the new red blood cells which enter the blood circulatory system. Also the the ribs and the breast bone of the skeleton protects the heart, the cranium of the skeleton prtects the brain. The bones also provide calcium which is necessory for the functioning of the nervous system. The brain controls the skeletal movements of the body. The cerebellum of the brain controls the voluntary skeletal movements and the medulla controls the involuntary skeletal movements of the body. The blood brain barrier formed by the endothelial cells of the capillary walls located in the brain seperates the circulating blood from the brain and the extraclellular fluid in the central nervous system and acts as a selective semipermeable border.
The main bones preserve the neurotic mode ways similar to the brain and spinal cord of becoming damaged. The brain controls the heart rate and blood pressure. The heart gives the brain two elements which are oxygen and nutrients by pumping blood of the human body. The bone cells are sustained by the blood pumped by the heart. Receptors in tissues give the brain with knowledge regarding material posture and mobility. The brain manages the reduction of skeletal muscle.
Vesicles in a sentence
Cellulose can be digested by humans and is a type of carbohydrate, true or false?
Answer:
false
Explanation:
what is a disadvantage of using wind energy
Answer:
wind turbines are very expensive to put up and wind is always reliable because it isn't always windy
Explanation:
process that uses energy from light to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
Photosynthesis my man!
Which of the following is a true statement about acids and bases
-an acid has a ph of 7.1
-An acid accord hydrogen ions
-A base has ph of 7
-a base gives off hydroxide ions
An acid has a pH lower than 7, while a base has a pH higher than 7.'A base gives off hydroxide ions' ,The correct statement is a.
Explanation:Acidic solutions have a pH lower than 7, while basic solutions have a pH higher than 7. Therefore, the statement 'An acid has a pH of 7.1' is false. An acid increases the concentration of hydrogen ions (H+) in a solution, which lowers the pH. The statement 'A base has a pH of 7' is also false. A base decreases the concentration of hydrogen ions and increases the concentration of hydroxide ions (OH-) in a solution, raising the pH. So, the correct statement is 'A base gives off hydroxide ions.' Bases release hydroxide ions, which can accept hydrogen ions to form water, reducing the solution's acidity.
what is the purpose of a pH indicator?
To determine visually the pH(acidity of basicity) of the solution.
A pH indicator is used to determine the pH of an unknown solution by changing colors in response to the solution's acidity or alkalinity. They are reliable tools to visually estimate the acid or base concentration of a solution, with various different indicators that exhibit different color changes at different pH values.
Explanation:The purpose of a pH indicator is to determine the pH value of an unknown solution. pH indicators, such as litmus or pH paper, change color in response to the acidity or alkalinity of a solution - specifically, they react visually to the concentration of hydronium ions. These indicators can be used to test how much acid (acidity) or base (alkalinity) exists in a solution, providing a quick and easy method for measuring pH.
There are a variety of acid-base indicators available, all of which exhibit different colors at different pH values. For instance, phenolphthalein turns pink in basic solutions and remains colorless in more acidic solutions. Universal indicators and pH paper contain a mixture of indicators, thus providing color-changing reactions across a wide range of pH values. This gives us the ability to determine the approximate pH of a solution by process of elimination.
An indicator's color is determined by the relative concentrations of the two species (acidic and basic) in the solution, which can be understood using the Henderson-Hasselbalch equation. The color change interval, or pH interval, refers to the range of pH values over which a change in the indicator's color is observed.
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Which symptom would most likely occur in an organism exposed to tetrodotoxin
The right naswer is D.paralysis due to lack of action potentials to signal muscle tissue.
Tetrodotoxin (TTX) is a toxin (neurotoxic) isolated for the first time in 1909 and present in some species of fish, tetraodons.
It is also called Fugu poison, and tetraodon poison.
Tetrodotoxin is a potent neurotoxin produced by four different strains of bacteria: Aliivibrio fischeri, Pseudomonas sp, Vibrio altermonas and Vibrio alginolyticus.
Tetrodotoxin selectively blocks the pore of voltage-gated sodium channels, thus preventing the passage of nerve impulses. This blockage under a certain level is reversible.
The clinical picture is as follows:
* Impairment of the nervous system with oral and perioral paresthesia, nausea often accompanied by vomiting, sometimes with diarrhea and abdominal pain;
* Dizziness, pallor, feeling unwell, then ataxia and general numbness with the sensation of floating. * Tingling and tingling of the extremities preceding paralysis of the lower limbs and extremities;
* Changes in deep sensitivity, throat and larynx are affected very early causing dysphagia or complete aphagia, and dysphonia;
* Dilation of the pupils (mydriasis);
in the case of acute intoxication, bradycardia and hypotension, hypersalivation, hypothermia, hypersudation, asthenia;
* Cyanosis of the extremities and the lips, petechial haemorrhages on the body.
Which are protists that act like fungi ?
There are plant-like protists (e.g. algae), animal-like protists (e.g. protozoa) and fungi-like protists. Their classification is based on their mode of nutrition, which is extremely diverse. Slime molds and water molds are both included in the kingdom protista and considered fungi-like protists.
There are plant-like protists (e.g. algae), animal-like protists (e.g. protozoa) and fungi-like protists. Their classification is based on their mode of nutrition, which is extremely diverse. Slime molds and water molds are both included in the kingdom protista and considered fungi-like protists
What have we learned from fossil evidence about evolution?
It is an abrupt change.
The process is observable.
It takes place during a lifetime.
The best organism is always selected.
Fossil evidence teaches us that evolution is a gradual process, happening over millions of years and generations, not during an organism's lifetime. It's not about 'the best organism is always selected', but about the 'fit', the organisms better adapted to their environment. Though we can't observe it directly, we infer it from indirect evidence like fossils.
Explanation:Fossil evidence has been instrumental in our understanding of evolution. Fossils are the physical remains of organisms from past geological ages which have been preserved in the Earth's crust. They serve as a historical record of life on Earth, documenting changes in organisms and their environments over time. Contrary to your point, fossil records have taught us that evolution is not an abrupt change. It's a slow, gradual process that takes place over millions of years.
Fossils help us to identify extinct species and track how species have evolved or become extinct, providing evidence of the evolutionary lineage of organisms. Through this, we have understood that evolution doesn't take place during an organism's lifetime, but across many generations.
Fossil records also help dispel the idea that 'the best organism is always selected'. The theory of natural selection isn’t about 'best', but rather about 'fit', implying the species most adapted to their environment have a better chance of survival and reproduction. Finally, while evolution cannot be observed directly, it can be inferred from indirect evidence such as fossil records.
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The phytoplankton at the bottom of the pyramid take in and store a certain amount of the suns energy. Does all of the energy stored by the phytoplankton reach the top level of the pyramid?
Answer:
Phytoplanktons are single celled organisms found in aquatic ecosystems. They make their own food by capturing sunlight for photosynthesis. Example of some phytoplanktons are diatoms, dinoflagellates and cynobacteria ( blue green algae). Phytoplanktons functions as the primary producers of the aquatic ecosystem. They attain the bottom level in the energy pyramid and store certain amount of suns energy and convert it into food. The energy derive from food is transferred to higher energy levels in the energy pyramid as phytoplanktons are eaten up by many aquatic animals. Therefore, the energy transferred from phytoplankton to higher energy levels gets decreased according to 10% law which says, energy decreases 10% at each higher trophic level. So, all the energy stored by the phytoplankton will not reach the top level of the pyramid.
Answer:
No, because some of the energy is lost to the environment as heat as it is transferred between organisms.
Explanation:
Which statements about the moon’s phases are true? CHECK ALL THAT APPLY
1-The same side of the moon always faces Earth.
2-The moon shines because it reflects light from Earth.
3-A new moon occurs when the Sun shines on the side of the moon not facing Earth.
4-The waning gibbous and waning crescent occur immediately before the full moon.
5-During the waxing phases of the moon, the side lit by the Sun is not facing Earth.
6-A full moon happens when the Earth is between the Sun and the moon.
Answer:
A C F
There ya go!
Explanation:
The moon's phases explained: same side always faces Earth, new moon occurs when sun shines on opposite side, and during waxing phase the illuminated portion increases.
Explanation:The statements 1, 3, and 5 about the moon’s phases are true.
The same side of the moon always faces Earth. This is because the moon's rotation takes the same amount of time as its orbit around Earth.A new moon occurs when the Sun shines on the side of the moon not facing Earth. This means that we cannot see the moon during a new moon phase.During the waxing phases of the moon, the side lit by the Sun is not facing Earth. Waxing phases occur between new moon and full moon when the illuminated portion of the moon seen from Earth increases.Learn more about Moon's Phases here:https://brainly.com/question/31392459
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Today’s beverage pasteurization processes are the result of this scientist’s work.
Louis pasteur! he also invented principles of vaccination and more.
A student gets a cut on his hand. Within a week, the cut has healed and there is little evidence of the original injury. What can we assume about the cells surrounding the cut?
(A) Mitosis has occurred, where healthy eukaryotic cells divide to form new cells.
(B) Binary fission has occurred, allowing the injured prokaryotic cells to repair and grow.
(C) The remaining cells grew and reproduced asexually through binary fission.
(D) The injured eukaryotic cells healed, repaired, and grew through mitosis.
(A) Mitosis has occurred, where healthy eukaryotic cells divide to form new cells.
As the cut was healed by mitosis which occurred where healthy cells divide to form new cells, i.e., option A.
What is mitosis?Mitosis is a type of cell division that forms two daughter cells that is diploid.
Whenever any injury occurs, this process helps to heal and repair the torn tissues, resulting in the formation of new cells.
In the given scenario, it is mitosis that aids division and form new cells.
Thus, the correct option is A.
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(Number 15)Which phase of mitosis during growth and development demonstrates the communication and exchange of genetic information by aligning chromosomes in the middle of the cell?
The correct answer is: 2.metaphase.
Mitosis is a process of cell division and it is separatd into phases.
• Interphase-DNA replication (two identical full sets of chromosomes),
• Prophase-chromosomes composed of two sister chromatids with identical genetic information,
• Metaphase- chromosomes line up along the centre of the cell,
• Anaphase- chromatids are pulled apart by the mitotic spindle (one chromatid to one pole and the other chromatid to the opposite pole),
• Telophase- a full set of chromosomes at each pole of the cell.
The diagram reveals that lipids and proteins are both parts of cell membranes.They have different functions because lipids work to
The function of Lipids is to maintain cell fluidity or flexibility. They also maintain the water balance between the cell and the surrounding environment.
What is lipid?The function of Lipids is to maintain cell fluidity or flexibility. They also maintain the water balance between the cell and the surrounding environment. Cell is defined as the base of life as it is the structural as well as functional unit of life. Cell is made up of pre existing cells and the cell contain various cell organelles such as mitochondria, endoplasmic reticulum, ribosomes, golgi appratus, nucleus, and cytoplasm.
Basically, cell is of two type one in prokaryotic and another one is eukaryotic. The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.
The unicellular animals are made up of single cell and all the functions carried out in a single cell like amoeba and multicellular organisms are made up of multiple cells and there is specific cell for specific functions.
Therefore, The function of Lipids is to maintain cell fluidity or flexibility.
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proteins that will be released from the cell are assembled at the??
The proteins are complex molecules that play a part in the structural organization, functioning, and regulating of tissue and organs.
Proteins that are released from the cell are assembled at the cell organelle called the ribosome and endoplasmic reticulum.
The ribosome is a complex organelle made up of ribosomal RNA molecules and various proteins.Proteins are synthesized and assembled at a ribosome. They gather and link the amino acids through peptide bonds and form the protein. They are exported to other cell organelles like cell membranes, or exported to the outside of the cell.The ribosomes attaches the protein further to the Endoplasmic Reticulum conferring them the rough look.Therefore, proteins are assembled at ribosomes and endoplasmic reticulum.
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what is meant by selective breeding
Selective breeding also artifical selection . Selective breeding is the process is used by humans beings to produce new organisms with desirable characteristics.
Example: The cattles produces a huge amount of milk. It mens that the meat we eat is the selective breeding of ships ,chikens, pig and dogs etc.
Which describes granite and basalt?
A.
Granite is a coarse-grained intrusive igneous rock, while basalt is a fine-grained extrusive igneous rock.
B.
Both granite and basalt are fine-grained intrusive igneous rocks.
C.
Granite is a coarse-grained extrusive igneous rock, while basalt is a fine-grained intrusive igneous rock.
D.
Granite is a fine-grained extrusive igneous rock, while basalt is a coarse-grained intrusive igneous rock.
B. Both granite and basalt are fine-grained intrusive igneous rocks.
Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form.
Answer:
Option (A)
Explanation:
Granite is an igneous rock in which the crystals are large enough to be seen with the naked eye and it is an intrusive type of rock. They are felsic in nature as they contain a high amount of silica. They are light-colored and are formed in the continental crust. This rock is formed when hot intruding magma gets crystallized under the earth's surface. They have a relatively low specific gravity.
Basalt is also an igneous rock in which the crystals are small enough to be observed and is an extrusive rock. They are mafic in nature due to their lesser amount of silica content. They are dark-colored and are commonly associated with the oceanic as well as continental crust. This rock is formed on the ocean floor and has a high specific gravity.
Thus, the correct answer is option (A).
A red blood cell will shrink in size when placed in a more concentrated salt solution because of the passive process called
Answer:
Osmosis
Explanation:
In a highly concentrated salt solution, concentration of water is comparatively lower than the fluid inside red blood cells. This develops a concentration gradient.
Due to this difference in concentration, the water starts flowing out of the red blood cells across its permeable layer. Due to this movement of water, red blood cell shrinks. This physical phenomenon in which a substance move from a region of high concentration to a region with lower concentration across any permeable membrane is called Osmosis.
1. Which sign is NOT for a chemical change?
A.Color change
Transfer
B.Change in volume
C. Transfer of heat or light
Consider the following cross between two birds: GGLI (male) x Ggll (female) What trait will most likely be observed in all offspring of the above set of parents?
Assuming these options, since you didn't add any, here's the answer:
A. Green feathers
B. Yellow feathers
C. Long beak
D. Short beak
Considering
G = Green, L = Long, g = yellow, l = Short
The traits which are most likely to be observed in all the offspring of these parents are Green feathers and Long beak as they are dominant in comparison to the yellow feathers and short beak, which are recessive in this case.
We can say that this has occurred because of crossing over of the homologous chromosomes.
Answer: Green feathers
Explanation:
r 4. Nervous 5. Endocrine 6. Cardiovascular 7. Lymphatic 8. Respiratory 9. Digestive 10. Urinary 11. Reproductive Which systems assist in regulating body temperature?
None of the above... Ingumentary system is the one that regulates body temperature. The ingumentary system is skin, hair , sweat glands and nails
Distinguish among hypertonic hypotonic and isotonic solutions
Hypertonic:Cell has lost all of the solute
Hypotonic: Cell is overfilled and is ready to burst
Isotonic: Cell is at a homeostasis condition
Final answer:
Hypertonic solutions have a higher solute concentration than the cell, leading to water leaving the cell. Hypotonic solutions have a lower solute concentration, causing water to enter the cell. Isotonic solutions have equal solute concentrations, which lead to no net water movement across the cell membrane.
Explanation:
Distinguishing Hypertonic, Hypotonic, and Isotonic Solutions
Cells encounter different environments which can impact their function based on the concentration of solutes outside of them. Three terms-hypertonic, hypotonic, and isotonic-describe the relationship between the external solution's solute concentration and that within the cell's cytoplasm.
Hypertonic solutions have a higher solute concentration compared to the cytoplasm. This causes water to leave the cell, potentially leading to the cell shriveling up.Hypotonic solutions have a lower solute concentration than the cell's cytoplasm. Water will enter the cell, which can result in the cell swelling or even bursting.Isotonic solutions have the same solute concentration as the cell's cytoplasm. In this scenario, there is no net movement of water into or out of the cell although water molecules continue to exchange across the cell membrane.Understanding these osmotic conditions is crucial, especially in healthcare, where intravenous solutions must be isotonic to prevent damage to blood cells.
the axial skeleton includes the
A) vertebra, skull, and ribs
B) hip bones, knees, and feet
C) shoulder bones, elbows, and hands
D) bones of the fingers and toes
The axial skeleton includes the vertebra, skull, and ribs. The other options are parts of the appendicular skeleton.
Explanation:The axial skeleton consists of the central core of the human body. The axial skeleton includes option A: the vertebra, skull, and ribs. The bones mentioned in other options such as hips, knees, elbows, shoulder bones, fingers and toes are included in the appendicular skeleton, not the axial skeleton.
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Flowering tuntra plants must bloom and see seed quickly because
because the summers then are are very short and they should be disperse as the seeds and flower can grow
question answered by
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Describe the relationship between chromosomes, messenger RNA, and proteins.
A chromosome is a packaged and organized structure containing most of the DNA of a living organism. Messenger RNA is a large family of RNA molecules that convey genetic information from DNA to the ribosome, where they specify the amino acid sequence of the protein products of gene expression. Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues.
Which variable is being manipulated ? Brands a,b and c of hamburger meat artistic for the amount of fat in each each brand will be cooked for exactly 7 minutes the same pan will be used for each test the brands will each be drain for exactly 2 minutes by using a strainer in a measuring cup to determine the amount of fat that is drain
The hamburger meat is the variable that is manipulated
The variable being manipulated in the experiment is the brand of the hamburger meat. All other elements are kept constant, making them controlled variables. The outcome measured will be the amount of fat drained.
Explanation:In this described experiment, the variable being manipulated, or the independent variable, is the brand of the hamburger meat (Brands a, b, and c). This variable is consciously changed by the researcher to observe if it results in different outcomes.
The other elements, like cooking each brand for exactly 7 minutes in the same pan, draining each for 2 minutes, etc., are controlled variables because they remain the same throughout the experiment.
Therefore, the amount of fat drained from each meat (dependent variable) will be directly affected by the brand of meat chosen (independent variable).
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what conclusion could you draw about the cell picture? (picture from biologywise.com) A.) the cell is prokaryotic because it has a nucleus. B.) the cell is prokaryotic because it does not has a nucleus. C.) the is eukaryotic because it has a nucleus. D.) the cell eukaryotic becausebit does not have a nucleus
correct answer B.) "The cell is prokaryotic because it does not have a nucleus."
Based on the options provided:
A.) "The cell is prokaryotic because it has a nucleus." - This is incorrect because prokaryotic cells do not have a nucleus.
B.) "The cell is prokaryotic because it does not have a nucleus." - This is correct. Prokaryotic cells, such as bacteria, do not have a membrane-bound nucleus.
C.) "The cell is eukaryotic because it has a nucleus." - This is incorrect because eukaryotic cells do have a nucleus, but the presence of a nucleus does not automatically indicate that a cell is eukaryotic.
D.) "The cell is eukaryotic because it does not have a nucleus." - This is incorrect because eukaryotic cells do have a nucleus.
correct option B
which of the following elements are from group 17, the Halogens?
Why do bacterial infections spread quickly? A. Because bacterial cells cause the infected host cells to reproduce quickly B. Because bacterial cells reproduce very quickly C. Because bacterial cells produce large amounts of poison D. Because the immune system does not recognize bacterial cells as a threat
Answer: Option B
Explanation:
The bacterial infections are caused by invading of harmful bacteria inside the body of the host cell. They invade inside the body and starts replicating inside it.
The rate of replication of bacteria in the host is very rapid. This makes the infection grow and spread so rapidly.
Bacterial infection can be cured by taking antibiotics that is used to kill these bacteria.
Hence, the correct answer is option B