The articular cartilage of a typical long bone covers portions of what part of the bone?
A) metaphysis
B) diaphysis
C) epiphysis
D) nutrient foramen
E) medullary cavity
Answer: C
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Second messengers
A. are necessary for all receptor signal transduction mechanisms. B. act in the cell cytoplasm. C. are always proteins. D. always function to activate enzymes. E. only function as intercellular messengers.
What is the role of NADH in metabolism?
A) convert pyruvic acid into acetyl-coA B) produce bicarbonate ions for a pH buffer C) transport hydrogen atoms to coenzymes D) produce carbon dioxide E) phosphorylate ADP into ATP
Muscle fibers can have various arrangements. The most powerful arrangement is called
A) parallel. B) convergent. C) circular. D) pennate. E) None of the answers are correct.
The respiratory centers regulate the activities of the respiratory muscles by
A) acting directly to change heart rate and cardiac output. B) responding to conscious control during periods of physiological stress only. C) adjusting the frequency and depth of pulmonary ventilation. D) stimulating the nuclei of the parasympathetic nervous system. E) None of the answers are correct.