Answer:
Dog 1: Eebb
Dog 2: EeBb
Dog 3: eeBb
Explanation:
Let's first analyze the offspring to know their genes
Black: ee (to be able to be black) Bb (because they told you black is dominant
Brown: ee (to be able to be brown) bb) (because is recessive)
Golden: Ee (because E is dominant to Golden) and here could be bb or Bb.
Now, we know what we are looking for: ee, Ee, Bb, and bb. Let's analyze the parents.
DOG 1: golden female
Ee and could be Bb or bb
DOG 2: golden male
Ee and could be Bb or bb
The had both color breed, so one will be bb and the other will be Bb.
DOG 3: black female
ee Bb (to be back)
So, because DOG 3 x DOG 2 had browned, we could say DOG 2 final alleles are EeBb and DOG 1 final alleles are Eebb
The genotypic arrangements for the three dogs based on the breeding results are assumed to be E_B_ (Dog 1), E_B_ (Dog 2), and EeBb (Dog 3). Epistasis, particularly the E gene's dominance over B and b alleles, results in the golden fur color.
Explanation:In Labrador retrievers, fur color is determined by two main genes: B and E. In your question, it's mentioned that the golden color is a result of epistasis, where the E gene is dominant over the B and b alleles, causing the coat color to be golden regardless of the presence of B or b. The genotypes of the dogs can be deduced from the breeding results.:
Dog 1, a golden female would have the genotype E_B_ as its color shows it has the dominant E. Dog 2, a golden male, based on its offspring, must also have the genotype E_B_. Dog 3, a black female that can produce brown and golden puppies when mated with the golden male, likely has the genotype EeBb. Learn more about Genotypes and Epistasis here:https://brainly.com/question/31794199
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Explain the possible problems associated with the high diastolic pressure.
Answer:
High diastolic pressure can leads to kidney damage, vision less and chronic renal failure.
Explanation:
Diastolic pressure may be defined as the blood pressure in the arteries when the heart is completely filled. When the blood pressure is measured the lower value of blood pressure indicates the diastolic blood pressure.
Different problems associated with high diastolic pressure are:
Kidney damage: The high blood pressure can cause the narrow areteies around the kidney and may result in kidney damage.
Vision less: The blood vessel may damage in high diastolic pressure that may hinder the blood flow in the retina and results in vision less.
Chronic renal failure: High diastolic pressure damages the renal artery and causes chronic renal failure in an individual.
Superficial region around the renal medulla
Answer:
Renal cortex
Explanation:
The renal medulla of a kidney is surrounded by renal cortex. The renal cortex is the granulated layer. It is the renal cortex in which the renal corpuscle (glomerulus and Bowman's capsule) are present. The renal cortex is reddish brown in color. This is due to the fact that most of the renal arteries deliver the blood to the cortex.
what is melatonin's main function? what are its other functions?
melatonin is a hormone secreted by the pineal gland and its main function is to regulate sleep rhythm (circadian rhythm)
Compare sympathetic vs parasympathetic nervous system
Describe difference between dehydration reaction and hydrolysis. How do these reactions relate to macromolecules?
Answer:
Dehydration reaction includes removal of water molecule from compounds to facilitate formation of bonds between them while hydrolysis reactions break the compounds by breaking the bonds.
Dehydration reactions form the complex macromolecules while hydrolysis reactions break them down into the simpler elements.
Explanation:
During dehydration reactions, removal of a water molecule from two compounds leads to the formation of a covalent bond between them. These reactions are mainly part of anabolic pathways. Two amino acids are joined together by peptide bond and a water molecule is released during the reaction.
Hydrolysis reactions are the opposite of dehydration reactions and are involved in catabolic pathways of macromolecules. The peptide bonds between amino acids are broken down by hydrolysis.
Dehydration reactions involve the formation of new bonds, while hydrolysis reactions break bonds and release energy. Each macromolecule is broken down by a specific enzyme.
Explanation:Dehydration and hydrolysis reactions are catalyzed, or "sped up," by specific enzymes; dehydration reactions involve the formation of new bonds, requiring energy, while hydrolysis reactions break bonds and release energy. These reactions are similar for most macromolecules, but each monomer and polymer reaction is specific for its class. For example, in our bodies, food is hydrolyzed, or broken down, into smaller molecules by catalytic enzymes in the digestive system. This allows for easy absorption of nutrients by cells in the intestine. Each macromolecule is broken down by a specific enzyme. For instance, carbohydrates are broken down by amylase, sucrase, lactase, or maltase. Proteins are broken down by the enzymes pepsin and peptidase and by hydrochloric acid. Lipids are broken down by lipases. The breakdown of these macromolecules provides energy for cellular activities.
True or False. The anterior pituitary gland is connected to the hypothalamus through capillaries that form the hypothalamus pituitary portal vasculature.
Answer:
True.
Explanation:
The anterior pituitary gland is connected to the hypothalamus through capillaries that form the hypothalamus pituitary portal vasculature.
Chymotrypsin
a. is secreted by the pancreatic acinar cells
b. digests proteins into peptides
c. works in the small intestine
d. all of the above
Answer: d. all of the above
Explanation:
Chymotrypsin is produced by the Pancreas and has the function of digesting proteins.It consists of three polypeptide chains connected by two inter-chain disulfide bridges. Chymotrypsin exerts an important biological function which is the hydrolysis of proteins in the small intestine. The cleavage of peptide bonds is selective, occurring only on the carboxyl side of aromatic side chains of tyrosine, tryptophan and phenylalanine, and large hydrophobic radicals such as methionine. Chymotrypsin also hydrolyzes ester
3. Mammals lack the enzymes for the net conversion of acetyl-CoA into oxaloacetate or any other citric acid cycle intermediate, but if oxaloacetate (or some other citric acid cycle intermediate) is drawn off for biosynthesis, it must be replenished. How is oxaloacetate replenished? Under what cellular conditions would this enzymatic step be favored?
Answer:
-Oxaloacetate is replenished by enzyme pyruvate carboxylase.
-This enzymatic reaction is favored when there is an increased demand of energy required by the cell.
Explanation:
Citric acid cycle is a major pathway for the ATP production. Oxaloacetate plays an important role in citric acid cycle as it starts with transfer of acetyl group of acetyl CoA to oxaloacetate with formation of citrate.
As mammals lack enzyme to convert acetyl-CoA into oxaloacetate, in mammals oxaloacetate is replenished by enzyme pyruvate carboxylase that performs carboxylation of pyruvate to form oxaloacetate.
Activity of this enzymatic reaction increases by high energy demand of cell, and increased level of acetyl CoA as it shows increased demand of oxaloacetate to perform citric acid cycle for energy production.
where would you not find a cholinergic nicotine receptor
Answer:
All parasympathetic target organs
Cholinergic nicotine receptors, which transmit signals in the nervous system and muscles, are not found in red blood cells, whose function is to carry oxygen and carbon dioxide.
Explanation:Cholinergic nicotine receptors are found in many areas throughout the body, particularly in the nervous system and muscles where they play a crucial role in transmitting signals. However, you wouldn't find cholinergic nicotine receptors in red blood cells. The function of red blood cells is to transport oxygen from the lungs to the body's tissues and carbon dioxide from the tissues back to the lungs. These cells, unlike neurons or muscle cells, do not have the need for synaptic signal transmission, thus they do not have these specific receptors.
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Bacteria are grown in 15N (heavy) medium and then transferred to 14N (light) medium and are allowed to replicate for 1 generation. The DNA is subsequently isolated and centrifuged in a CsCl2 gradient to yield what type of gradient band(s)?
Answer:
The intermediate density band is observed.
Explanation:
Messelson and Sthal's explained the model of semi conservative nature of DNA replication. According to this model, the newly synthesized DNA molecule contains one newly synthesized strand and one parental strand.
Firstly, bacteria grown in 15N media is transferred to 14N media. The isolated DNA is centrifuged and intermediate density DNA band is observed that contains one strand of 15N (parental strand) and one strand of 14N (newly synthesized strand).
Bacteria grown in a 15N medium and then transferred to a 14N medium for one generation produce DNA that, when centrifuged in a CsCl2 gradient, forms a band at an intermediate position between DNA formed in 15N and 14N. This supports the semi-conservative replication model of DNA.
Explanation:The experiment you're referring to was conducted by Matthew Meselson and Franklin Stahl. They used E. coli and grew it initially in a heavy nitrogen medium (15N). Afterward, these bacteria were transferred into a 14N (lighter nitrogen) medium where they were grown for one generation.
During the replication in the 14N medium, DNA from the bacteria was isolated and centrifuged in a cesium chloride (CsCl2) gradient. The result was, that a single band was observed which settled at an intermediate position between DNA formed in 15N and 14N. This finding supports a semi-conservative replication model where each new DNA molecule consists of one old and one new strand.
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The transition from an afferent arteriole to an efferent arteriole occurs in the
A. glomerulus.
B. medulla.
C. cortical radiate veins.
D. peritubular capillaries.
Answer: A. glomerulus.
Explanation:
Each kidney has about 1 million nephrons, the urine-forming unit, and each nephron is made up of a glomerulus (capillaries walls) and renal tubules. The glomerular is constituted by the capillaries walls, which branch out and form a network, covered by the Bowman's capsule that retains the liquid, and begin to form a sequence of tubes.
The blood reaches the kidneys through the renal artery, which branches into the afferent arterioles that attach to the glomerular capillaries (where blood is filtrated), then form the efferent arteriole, which again becomes capillaries - the peritubular capillaries, which surrounds the renal tubules.
The newly-discovered organism Yawle nhoj, has a diploid chromosome number of 56. Suppose that one of the chromosome pairs fails to disjoin properly during Meiosis I. How many chromosomes will be present in each of the four gametes that result from that meiosis? Assume meiosis II is normal.
Answer:
The correct answer will be 2 gametes with 29 chromosomes and 2 gametes with 27 chromosomes will be formed.
Explanation:
Meiosis is a type of cell division which produces four daughter cells. Chromosomes separate or the disjunction of chromosomes takes place during anaphase I and anaphase II of meiosis I and II respectively.
If a chromosome fails to disjoin at meiosis I this will result in the production of four gametes with an unequal number of chromosomes. Out of four gametes, 2 gametes produced will be trisomic gametes that are with one additional copy of chromosome and 2 gametes will be monosomic with one less number of chromosome. It means the trisomic gametes will have 29 chromosomes while 2 monosomic gametes will have 27 chromosomes.
Thus, 2 gametes with 29 chromosomes and 2 gametes with 27 chromosomes will be formed is the correct answer.
Class ii mhc proteins are found on which of the following cell types?
Answer:
The answer to the question: Class II MHC proteins are found on which of the following cell types, would be: on macrophages and lymphocytes, particularly T-Cells.
Explanation:
MHC, or Major histocompatibility complex, is a very important part of the immune response that the body gives against an invading pathogen, or other foreign substances. There are three types in the human body, Class I, Class II and Class III and each of them will play a role on the cellular membrance of different types of cells and mediate different types of responses. In the human body, this histocompatibility complex is best known as HLA, or human leukocyte antigen, and it will ensure the recognition, or non-recognition of substances, tissues, and other organisms, by the human immune system. Class II, as mentioned before, are most usually found on the immune cells macrophages and lymphocytes, and they are the ones responsible for presenting antigens to these proteinic antibodies so that the immune cells can initiate a proper immune response.
Class II MHC proteins are present on professional antigen-presenting cells such as macrophages, dendritic cells, and B cells.
Explanation:Class II MHC proteins are found on a specific group of cells within the immune system known as professional antigen-presenting cells. These include macrophages, dendritic cells, and B cells. Unlike MHC I molecules that are found on all nucleated cells, MHC II molecules play a crucial role in the adaptive immune response by presenting abnormal or nonself pathogen antigens to T cells, leading to their activation.
True-breeding flies with red eyes and long wings were crossed to flies with white eyes and miniature wings. All F1 offspring had red eyes and long wings. The F1 females flies were then crossed to males with white eyes and miniature wings. The following results were obtained for the F2 generation:
204 red eyes, long wings
208 white eyes, miniature wings
40 red eyes, miniature wings
48 white eyes, long wings
What is the map distance between these two genes?
Answer:
176m.u.
Explanation:
Map distance can be calculated by the following formula:
Map distance = [tex]\frac{\text{Recombinant off spring}}{\text{total number of offspring}}\times 1000[/tex]
Recombinant offsprings are redeyes, miniature wings + white eyes, long wings.
Recombinant offspring = 40 + 48
=88.
Total number of offspring = 204 + 208 + 40 + 48
= 500
Map distance = [tex]\frac{88}{500}\times1000[/tex]
Map distance = 176 m.u.
The map distance between two genes is 176 m.u.
Difference between spinal tap and epidural
Answer:
It is easy to confuse a spinal block and spinal epidural because they are both injections into the spinal area. For a spinal block, narcotics or anesthetic is injected once with a needle. For a spinal epidural or combined spinal epidural, a catheter is placed in the epidural space to allow continuous anesthesia.
Explanation:
An understanding of how stress affects our resistance to disease is the central focus of the field of
Answer:
Psychoneuroimmunology
Explanation:
Psychoneuroimmunology also known as psychoneuroendocrinoimmunology, is a field of science in which scientists study about the effect of nervous and psychological processes on the immune system of man.
The latest scientific studies strongly support the fact that many health ailments like gastro-intestinal diseases, cancers, HIV, eczema, Asthma are strongly linked with the mental health of an individual. A positive outlook and a less stressful mind has clearly more healing effects towards the body or in other words a peaceful and positive mind exhibit more resistance towards many diseases.
All such cases are studied in the field of Psychoneuroimmunology and latest researches and cases are supporting above mentioned facts.
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Acid chyme produced by the stomach is neutralized in the intestine by what?
Answer: Sodium bicarbonate produced by the Pancreas.
Explanation:
The mixture of partially digested food and gastric juice is called chyme. Chyme leaves the stomach through the pyloric sphincter to enter the small intestine. This is where all terminal digestion of carbohydrates, lipids, and proteins occurs, and where the products of digestions—amino acids, glucose, and so on—are absorbed into the blood. The first 25 centimeters is the duodenum; the remainder of the small intestine is divided into the jejunum and the ileum. The duodenum receives acidic chyme from the stomach, digestive enzymes, and bicarbonate from the pancreas, and bile from the liver and gallbladder. The pancreatic juice enzymes digest larger food molecules into smaller fragments.
Acid chyme from the stomach is neutralized in the intestine by bicarbonate, which is released by the pancreas. This happens in the duodenum, the first part of the small intestine.
Explanation:The acid chyme produced by the stomach is neutralized in the intestine by a substance called bicarbonate. Bicarbonate is released by the pancreas and works to neutralize the acidity of the chyme which is essential for the enzymes in the intestine to function properly. This process takes place in the duodenum, the first section of the small intestine, right after the stomach.
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You exhale about .0800 liters of CO2 (carbon dioxide) gas in a single breath. 22.4 liters of CO2 contain 6.022 x 1023 molecules. 6,022 x 1023 CO2 molecules have a mass of 44.0 grams. Find the A) number of carbon dioxide molecules you exhale in each breath. Find the mass of the CO2 you exhale in a single breath.
Answer:
A) [tex]2.150 * 10^{22}[/tex]
B) 1.57 grams
Explanation:
Given -
Amount of gas exhaled in one single breathe [tex]= 0.080[/tex] liters
[tex]22.4[/tex] liter of carbon dioxide contains [tex]6.022 * 10^{23}[/tex] molecules
One liter of carbon dioxide contains [tex]= \frac{6.022*10^{23}}{22.4}\\= 2.688 * 10^{23}[/tex]
A) Number of molecules in [tex]0.08[/tex] liter of carbon dioxide [tex]= 0.08 * 2.688 * 10^{23}\\= 2.150 * 10^{22}[/tex]
B) Mass of [tex]6.022 * 10^{23}[/tex] molecules is equal to [tex]44[/tex] grams
Mass of one molecule [tex]= \frac{44}{6.022*10^{23}} \\= 7.306*10^{-23}\\[/tex]
Mass of molecule is[tex][tex]7.306*10^{-23} * 2.150 * 10^{22}\\= 1.57\\[/tex][/tex] gram
Taking into account the rule of three:
the number of carbon dioxide molecules you exhale in each breath is 2.15×10²¹.the mass of the CO₂ you exhale in a single breath is 0.157 grams.Rule of threeIn first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.
To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: [tex]x=\frac{cxb}{a}[/tex]
Number of carbon dioxide moleculesTo find the number of carbon dioxide molecules, you know that 22.4 liters of CO₂ contain 6.022×10²³ molecules.
If you exhale about 0.0800 liters of CO₂ (carbon dioxide) gas in a single breath, you can aply the following rule of three: if 22.4 liters of CO₂ contain 6.022×10²³ molecules, 0.0800 liters contain how many molecules?
[tex]amount of molecules=\frac{0.0800 litersx6.022x10^{23} molecules}{22.4 liters}[/tex]
amount of molecules= 2.15×10²¹
Finally, the number of carbon dioxide molecules you exhale in each breath is 2.15×10²¹.
Mass of the CO₂ you exhale in a single breathTo find the mass of the CO₂, you know that 6.022×10²³ molecules have a mass of 44.0 grams.
If you exhale about 2.15×10²¹ molecules of CO₂ (carbon dioxide) gas in a single breath, you can aply the following rule of three: if 6.022×10²³ molecules have a mass of 44.0 grams, 2.15×10²¹ molecules contain how much mass?
[tex]mass=\frac{2.15x10^{21}moleculesx44 grams }{6.022x10^{23} molecules}[/tex]
mass= 0.157 grams
Finally, the mass of the CO₂ you exhale in a single breath is 0.157 grams.
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Which condition involves an uninjured body part experiencing pain as the result of injury to another part of the body?
Select one:
a. sensory adaptation
b. referred pain
c. receptor potential
d. interceptors
Answer:
Referred pain
Explanation:
Referred pain may be defined as the pain perceived at differnet location of body other than the individual pain location.
Referred pain depends upon the intensity and duration of the pain. Refereed pain is generally generated by the potent mechanism of temporal summation. Referred pain is the condition of the body in which the uninjured body part experiences pain due to the injury of another body part.
Thus, the correct answer is option (b).
Sympathetic nervous system vs parasympathetic nervous system
Answer:
Differences between Sympathetic and Parasympathetic
1. Anatomical: The location of preganglionic neurons of the autonomic ganglia and the extension of preganglionic and postganglionic fibers are different in these two systems;
2. Pharmacological: In the Sympathetic system we have the presence of Cholinergic fibers (Ach) and in the Parasympathetic system we have the presence of Noradrenergic fibers (NE);
3. Physiological: They act antagonistically, they rarely work harmoniously synergistically in coordinating visceral activity (balance)
The sympathetic nervous system readies the body for action, while the parasympathetic nervous system helps the body relax and recover. Sympathetic and parasympathetic divisions of the autonomic nervous system work in opposition to each other, regulating different bodily functions.
The sympathetic nervous system prepares the body for 'fight or flight,' whereas the parasympathetic nervous system allows the body to 'rest and digest.' Sympathetic neurons release norepinephrine onto target organs; parasympathetic neurons release acetylcholine. Activation of the sympathetic nervous system increases heart rate and blood pressure and decreases digestion and blood flow to the skin. Activation of the parasympathetic nervous system decreases heart rate and blood pressure and increases digestion and blood flow to the skin.
You are studying a protein called myprotein in the cytosol. You want to see if another protein called, otherprotein, is required for folding. You isolate the cytosolic fraction using salt precipitation. You want to perform an experiment to find if otherprotein binds and interacts with mylittleprotein. Which assay would be best to perform first?
a. SDS PAGE to see the banding pattern showing all the proteins that interact
b. Immunopreciptation, because this will allow us to pull down proteins that interact
c. Size chromatography, because chances are the proteins that interact are the same size
d. Affinity Chromatography, because we know that it binds other proteins
Answer:
size chromatography, because chance are the protein that interact are the same size
Consider a gene with two alleles that show complete dominance. When a homozygous recessive individual (qq) is crossed with a heterozygous individual (Qq), they have a 50 percent chance of producing a homozygous recessive offspring. The next time these two individuals breed, what are the chances that they will once again have a homozygous recessive progeny?
Answer:
There will be [tex]50[/tex]% chances of occurrence of a homozygous recessive progeny
Explanation:
Complete dominance is a situation in which the trait which is considered as dominant overshadow the trait represented by recessive allele.
Hence Q will always over dominate q
Thus, when next time a cross is carried out between homozygous recessive individual (qq) and heterozygous individual (Qq), the following offspring will be produced-
q q
Q Qq Qq
q qq qq
Thus, as we can see out of four offspring , two have homozygous recessive progeny i.e qq
Hence, the chances of occurence of a homozygous recessive progeny again is equal to
[tex]\frac{2}{4} * 100\\= 50[/tex]%
Indicate whether each of the following reactions is anabolic or catabolic by circling the appropriate word: Reaction Type of Reaction 1. Glucose + glucose → glycogen
Answer:
The reaction of Glucose + Glucose → Glycogen is called glycogenesis and is an anabolic reaction.
Explanation:
Metabolic reactions can be anabolic or catabolic. Anabolic reactions are those where small molecules are joined to form a larger molecule; and the use energy. On the other hand, catabolic reactions are those where large molecules are broken in smaller molecules; and they release energy.
Glucose molecules are smaller than Glycogen. For this reason, the metabolic reaction of Glucose + Glucose → Glycogen is an anabolic reaction called glycogenesis.
glycogenesis
Two types of metabolic reactions take place in the cell: 'building up' (anabolism) and 'breaking down' (catabolism).
Anabolic reactions use up energy. They are endergonic. In an anabolic reaction small molecules join to make larger ones. For example, the following condensation reactions that occur in cells are anabolic:
Some digestive products, such as water and electrolytes, will be absorbed by diffusion. They diffuse from an area of ____________ concentration in the intestinal lumen to an area of ____________ concentration in the cell.
Answer: Higher concentration; Lower concentration.
Explanation: The food that we eat undergoes digestion and breaks down into smaller components.
These small components of the food needs to be absorbed first by the process of diffusion.
The water molecules along with the electrolytes are absorbed from an area of its higher concentration in the lumen is transported to area where its concentration is very low.
Hence, the correct answer is diffusion, which is responsible for the transportation of products from one place (higher concentration) to another parts (lower concentration)in the body.
Digestive products like water and electrolytes are absorbed by diffusion, moving from an area of higher concentration in the intestinal lumen to an area of lower concentration in the cells. This happens both in the context of water and electrolytes and is guided by concentration gradients. The small intestine is the primary site for these absorption processes.
Explanation:Some digestive products, such as water and electrolytes, will be absorbed by diffusion. They diffuse from an area of higher concentration in the intestinal lumen to an area of lower concentration in the cell. This is a process driven by concentration gradients. The small intestine absorbs most of these substances with the aid of its absorptive cells and specialized structures like the microvilli.
For example, each day, about nine liters of fluid, containing water and electrolytes, enter the small intestine from ingested food, beverages, and GI secretions. About 90% of this water is absorbed in the small intestine, moving from an area of higher concentration in the chyme (the digestive substance in the lumen) to an area of lower concentration in the epithelial cells of the intestine. Similarly, electrolytes dissociate into ions in water and most of them are absorbed via active transport mechanisms throughout the small intestine.
Water movement in the body is facilitated by osmosis, a specialized form of diffusion. Water flows from regions of higher concentration to regions of lower concentration along an osmotic gradient across semi-permeable membranes, helping maintain an appropriate balance of solutes inside and outside of cells to ensure their proper function.
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Blood returning to the heart from the pulmonary circuit first enters the
Answer:
Veins
Explanation:
Blood returning to the heart from the pulmonary circuit first enters the veins.
Blood returning from the pulmonary circuit enters the heart at the left atrium.
This is a part of the circulatory system process that helps deliver oxygen-rich blood to the rest of the body.
Blood returning to the heart from the pulmonary circuit first enters the left atrium.
The blood travels from the lungs, where oxygen has just been absorbed and carbon dioxide has been expelled, through the pulmonary veins and into the left atrium.
Ultimately, the oxygen-rich blood will be pumped to the rest of the body.
This process is part of the circulatory system, which delivers nutrients and oxygen to cells and removes waste products.
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Where is the first electrical wave in the heart initiated?
Answer:
Sinoatrial Node
Explanation:
The sinoatrial node is like the natural pacemaker of the heart because it controls the heart beat or in other words, the cardiac rhythm. The sinoatrial node is found on the right atrium and it sends signals to both atria and then they contract. The signal is then carried to the atrioventricular node which spreads the signal to the ventricles and then the ventricles contract. The contractionof the ventricle is the pumping action of the heart.
What is a ductless gland?
The apical ends of intestinal cells face the intestinal channel and have long processes that facilitate the absorption of nutrients. What is the name of these processes and what cytoskeletal element forms their internal skeleton?
Answer:
microvilli, actin filaments
Explanation:
The apical ends of intestinal cells face the intestinal channel and have long processes that facilitate the absorption of nutrients. the name of these processes is microvilli and actin filaments from the cytoskeletal element forms their internal skeleton.
Which muscle have their insertion on the calcaneus?
Answer:
Gastrocnemius, plantaris and soleus muscle have insertion on calcaneus.
Explanation:
Calcaneus is also known as heel bone. This is the tarsus bone of the foot and other animals consist it as a point of hook.
Three muscles involved in the insertion of calcaneus are Gastrocnemius muscle, plantaris muscle and soleus muscle. These muscles are present in the posterior compartment of leg and helps in running, jumping and walking.
What are the 3 portions of the brain stem and what do each do?
Answer: The brain stem is a terminology used to refer collectively to the midbrain, pons, and medulla oblongata.
Explanation:
The midbrain is composed primarily of the optic lobes, which receive and process visual information it is responsible for reflexes involving eyes and ears. Pons is responsible for the reticular activating system and visceral control. The Medulla Oblongata is responsible for the sensory nuclei, reticular activating system, and visceral control.