Why is body temperature sometimes reduced during heart surgery?
A. to slow respiration
B. to increase heart rate
C. to decrease heart rate
D. to increase the oxygen content of blood
C
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The outermost extraembryonic membrane that eventually helps form the placenta is the
A. hypoblast. B. yolk sac. C. chorion. D. amnion.
Which of the following statements is/are true regarding bone growth?
A. When bone remodeling occurs, bone mass may stay the same. B. When bone remodeling occurs, bone mass may decrease. C. When bone modeling occurs, bone mass increases. D. both A and B E. all of the above
Which of the following is not a component of the overall ejaculatory response?
a. Arterioles supplying the penis dilate, causing erection b. Smooth muscles of the prostate, ducts, and seminal vesicles contract, causing emission. c. The sphincter at the neck of the bladder tightly closes. d. Semen is expelled from the penis by rapid contractions of skeletal muscles at the base of the penis. e. Rhythmical contractions and accompanying systemic responses are associated with a pleasant sensation known as orgasm.
The internal (intracellular) receptor for steroid hormones acts as a transcription factor. Therefore, the cellular response to a steroid would be expected to include
a. an increase in mRNA produced from specific genes. b. an increase in protein production, representing specific gene products. c. both of these. d. neither of these.