Sympathetic and parasympathetic fibers that innervate the heart pass through the
A) celiac plexus.
B) hypogastric plexus.
C) cardiac plexus.
D) pterygopalatine ganglia.
E) otic ganglia.
Answer: C
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Which of the following is not true of urine flow through the kidney?
A. Major calyces receive urine from minor calyces. B. The renal pelvis narrows down to become the ureter. C. The minor calyces receive urine directly from papillary ducts in the renal papillae. D. The renal pelvis receives urine directly from the minor calyces. E. All of these are true of urine flow through the kidney.
Which of these factors does not affect blood pressure?
A) Cardiac output B) Oxygen level C) Peripheral resistance D) Blood volume
Which is TRUE about the initial segment of an axon?
A. Its membrane potential at threshold is more positive than that of the cell body and dendrites. B. Its membrane potential at threshold is more negative than that of the cell body and dendrites. C. Synapses far from the initial segment are more effective in influencing whether an action potential will be generated in the axon than are synapses close to the initial segment. D. It is the region where neurotransmitter vesicles are docked and ready to be released by exocytosis. E. It can only conduct graded potentials because it lacks voltage-gated Na+ channels.
Which of the following statements about acetylcholine is correct?
A. Acetylcholine binds to nicotinic and muscarinic receptors. B. Acetylcholine binds to adrenergic receptors. C. Acetylcholine synthesis is catalyzed by acetylcholinesterase D. Acetylcholine is the neurotransmitter released by most sympathetic postganglionic neurons. E. Acetylcholine is generally transported back into presynaptic nerve terminals without being enzymatically degraded.