Which glial cell is found wrapped around nerve fibers in the PNS?
A. Schwann cells
B. Nodes of Ranvier
C. Oligodendrocytes
D. Satellite cells
E. Ependymal cells
Answer: A
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Frostbite results from peripheral _________ due to exposure to cold temperatures
A. vasoconstriction B. vasodilation
A 30 kg child sits on the right end of a see-saw 1 m from the axis. If a 20 kg child sits on the left end of the see-saw 2 m from the axis, what will happen?
A. the see-saw will tilt to the right B. the see-saw will tilt to the left C. the see-saw will balance D. need more information to predict outcome
The process in which lymphocytes that recognize self-antigens are prevented from being activated is ________.
A. clonal selection B. clonal anergy C. clonal deletion D. apoptosis
Why do the pharynx, esophagus, anus, and vagina have a similar epithelial organization?
A) All these sites are avascular. B) All these sites are well vascularized. C) All these sites need large amounts of mucus production. D) All these sites line hollow organs. E) All these sites are subject to physical stresses and abrasion.