Nicotinic receptors
A) respond to epinephrine.
B) respond to norepinephrine.
C) open chemically-gated sodium ion channels.
D) can be either excitatory or inhibitory in function.
E) are found at synaptic junctions of the sympathetic nervous system.
C
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What is the effect of decreased ventilation on the pH of body fluids?
A. The pH rises due to retention of CO2. B. The pH rises due to increased O2 levels. C. The pH is not influenced by ventilation. D. The pH drops due to retention of CO2.
The peptide ________ may play a role in the positive feedback of estrogen on GnRH secretion.
Fill in the blank(s) with the appropriate word(s).
Which of the following is false?
a. at age 6 an individual has more bones than they will as an adult b. infants have fewer bones than an older child c. as adults everyone has the same number of bones d. in old age individuals become shorter due to the changes in posture and compression of cartilage
By reducing body temperature during hot weather, skin helps to maintain
A. blood pH. B. body temperature homeostasis. C. brain activity. D. body structure. E. blood volume.