The protein backbone of a blood clot is ________.
A. thrombin
B. fibrin
C. plasmin
D. heparin
Ans: B. fibrin
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An obstruction in one of the coronary arteries would compromise the ability of the myocardial cells to undergo cellular respiration.
Answer the following statement true (T) or false (F)
Where are unmyelinated nerve fibers surrounded by Schwann cells?
A. In the CNS B. In the PNS and CNS C. In the PNS D. Nowhere. Unmyelinated nerve fibers are never surrounded by Schwann cells.
Nonfluent aphasia, due to a lesion in the ________, results in slow speech, difficulty in choosing words, or use of words that only approximate the correct word.
A. primary auditory area B. cerebral lateralization C. Broca area D. primary motor area E. Wernicke area
Negative feedback loops are ________
A) self-amplifying cycles B) not homeostatic mechanisms C) associated with "vicious circles" D) homeostatic mechanisms E) usually harmful