Compare the neurotransmitters of the neurons in the two divisions of the ANS.
What will be an ideal response?
All preganglionic autonomic fibers release acetylcholine (ACh stimulatory. Postganglionic parasympathetic fibers also release ACh, but the effects may be either stimulatory or inhibitory, depending on the nature of the receptor. Most postganglionic sympathetic terminals release the neurotransmitter norepinephrine (NE). The effects are usually stimulatory.
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Which of the following describes the operation of the heart and blood vessels?
A) systemic anatomy B) cardiovascular anatomy C) systemic physiology D) cardiovascular physiology
The two common iliac veins form the
A) femoral vein. B) popliteal vein. C) inferior vena cava. D) lumbar vein. E) great saphenous vein.
Organs that recondition the blood
a. receive disproportionately large percentages of the cardiac output. b. can withstand temporary reductions in blood flow much better than can organs that do not recondition the blood. c. must receive a constant blood supply in order to maintain homeostasis. d. both (a) and (b) above. e. both (a) and (c) above.
Which of the following is retroperitoneal?
a) pancreas b) stomach c) small intestine d) liver