A key influence of the atrioventricular node on the heartbeat is to
A. speed up the conduction of the electrical impulse to contract as it passes from the atria to the ventricles.
B. slow down the conduction of the electrical impulse to contract as it passes from the atria to the ventricles.
C. act as a barrier that prevents the conduction of the electrical impulse to contract as it passes from the atria to the ventricles.
D. not alter the speed at which the electrical impulse to contract passes from the atria to the ventricles.
E. block backflow of blood from the aorta into the right ventricle.
B. slow down the conduction of the electrical impulse to contract as it passes from the atria to the ventricles.
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Cardiac muscle cells need to generate significant amounts of ATP to allow for constant contractile activity. As a result, they primarily depend upon beta-oxidation of fatty acids, which has a higher energy yield than the catabolism of glucose. What would be the ATP yield for beta-oxidation of a hypothetical 10-carbon fatty acid?
A. 32 ATP B. 35 ATP C. 50 ATP D. 62 ATP E. 65 ATP Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about cellular respiration and beta-oxidation of fatty acids? How do these molecules plug into the process of cellular respiration? What other information is related to the question? Choose Answer Do you have all necessary information to determine the ATP yield from beta-oxidation of a 10-carbon fatty acid? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Overexploitation occurs as a result of ____
a. harvesting of predators b. transformation of an ecosystem to a desert c. soil nutrient loss
d. the combined outcome of desertification and global warming e. excessive harvesting of an animal or plant species
In which of the following animals does the anus develop before the mouth?
a. Deuterostome b. Diploblast c. Protostome d. Acoelomate
Describe the theme you have learned in this chapter relating to monosaccharides, disaccharides, and polysaccharides. Relate this to what you have learned about lipids and proteins as well
What will be an ideal response?