A mutation has damaged the formation of oxaloacetate. What process will be impaired?
A) ATP synthase B) electron transport chain
C) chemiosmosis D) citric acid cycle
Answer: D
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Bone-building cells are called ________.
A. osteoblasts B. osteoclasts C. osteocytes D. hemopoietics
In older individuals the response to an infection is lessened because the T cells are less responsive to ________.
Fill in the blank(s) with the appropriate word(s).
Vasopressin secretion
a. induces the kidneys to produce a small volume of concentrated urine. b. is stimulated when the body fluids are hypertonic. c. is inhibited when the arterial blood pressure is dangerously low. d. both (a) and (b) above. e. all of these answers.
The thickest myocardium is found in the walls of the _____. Why?
A) right atrium; because it must pump against the high pressure of incoming venous blood from the vena cavae. B) left atrium; because it must pump into the high pressure of the left ventricle. C) right ventricle; because it must pump into the high resistance of the pulmonary circulation. D) left ventricle; because it pumps into the systemic circulation and must push blood through the whole body.