Following an injury to his arm, a patient complains that he has no sensations from his "pinky." You suspect that he has damaged the
A. median nerve.
B. radial nerve.
C. musculocutaneous nerve.
D. ulnar nerve.
E. axillary nerve.
Answer: D
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Which best describes a role of L-type Ca2+ channels in cardiac muscle cells?
A. They are responsible for preventing tetanic contractions. B. They act as non-conducting voltage sensors that mediate excitation-contraction coupling. C. They are directly responsible for making cardiac muscle fatigue-resistant. D. They function exactly the same in cardiac muscle cells as they do in skeletal muscle. E. They cause the absolute refractory period to be very brief.
In the process known as Wallerian degeneration,
A) macrophages remove the debris of damaged axons. B) Schwann cells completely degenerate. C) the axon proximal to the injury degenerates. D) no trace is left of the path taken by a previous axon. E) All of the answers are correct.
the adrenal glands sit on top of the
What will be an ideal response?
This division of the ANS increases motility and secretion in the digestive tract
A) sympathetic B) parasympathetic C) both sympathetic and parasympathetic