Phosphodiesterase functions
A. activates cGMP.
B. to attach phosphate groups to enzymes.
C. as a membrane-bound receptor molecule.
D. to inactivate cyclic AMP.
E. to combine GTP with cyclic AMP.
Answer: D
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Protein synthesis consists of the process of:
a. mitosis b. translation c. transcription d. both B and C above
What is the function of chordae tendineae?
a. Prevent the cusps of the AV valves from opening back into the atrium. b. Close the AV valves during systole. c. Generate force to push blood through the heart. d. Carry electrical signals through the ventricular myocardium
Describe the process of transcription. What does it produce? Where in the cell does it occur? What molecules are involved? Explain what happens in each of the following stages: initiation, elongation, termination, and splicing.
What will be an ideal response?
The reason a human may be paler when exposed to cold temperatures is
A. purely psychological. B. dehydration of the stratum corneum. C. constriction of the dermal collagen and elastic fibers. D. vasodilation has occurred. E. vasoconstriction has occurred.