1.
Which of the following serves as a sensor, or as part of a sensor, that functions in a
negative feedback
system?
A.
Peripheral thermoreceptor neurons whose central axon terminals are located in
the skin.
B.
Peripheral axon terminals of carotid artery baroreceptors.
C.
Central hydrogen
–
ion sensitive chemoreceptors whose peripheral axon terminals
are loca
ted in the walls of the carotid artery.
D.
A and B.
E.
A and C.
F.
B and C.
G.
A, B, and C.
H.
None of the above.
2.
Which of the following serves as a controlled variable in a negative feedback system?
A.
Blood plasma levels of glucose.
B.
Blood
plasma levels of glucagon.
C.
Blood plasma levels of glycogen.
D.
A and B.
E.
A and C.
F.
B and C.
G.
A, B, and C.
H.
None of the above.
3.
Which of the following serves as an actuating signal, or as part of an actuating signal, in
a negative feedb
ack system?
A.
Action potentials in diaphragm muscle fibers.
B.
Action potentials in sympathetic neurons that release acetylcholine (ACh) near
the SA node of the heart.
C.
Blood plasma levels of oxytocin.
D.
A and B.
E.
A and C.
F.
B and C.
G.
A, B,
and C.
H.
None of the above
Solution:
Solution:
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