How many single bonds can a carbon atom form if it is double-bonded to an oxygen atom?
A. 1
B. 2
C. 3
D. 4
Answer: B
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Innate defenses are
A. slow and nonspecific. B. fast and nonspecific. C. fast and specific. D. slow and specific.
In the late stages of pregnancy, estrogen stimulates increased
A. release of hCG. B. secretion of atrial natriuretic factor by the heart. C. growth of the corpus luteum. D. production of oxytocin receptors in the uterus.
35) Your blood glucose level has dropped perilously low because you have been starving yourself for a couple of days to lose weight. Your liver, directed by the hormone insulin, converts its last stored glycogen into glucose to get it out into your bloodstream. In this scenario, the liver is the
A) receptor. B) effector. C) control center. D) feedback. E) balance.
In a negative feedback loop, a change from a set point _____.
helps to maintain homeostasis occurs in all negative feedback mechanisms can be the result of positive feedback mechanisms never occurs in the body