Fast fibers
A) have twitches with a very brief contraction phase
B) have low resistance to fatigue and have quick twitches
C) rely on aerobic metabolism
D) have low resistance to fatigue
E) have many mitochondria
B) have low resistance to fatigue and have quick twitches
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A weightlifter uses muscles so the muscles exert more than 75% of their maximum tension. This stimulates
A. shrinking of skeletal muscle. B. conversion of skeletal to smooth muscle. C. an increase in slow, fatigable white fibers. D. muscle fibers developing new filaments of actin and myosin.
What chemical dissolves blood clots?
A) protein C B) plasmin C) thromboxane A2 D) heparin E) fibrin
What is the most potent stimulus of the thirst mechanism?
A) osmolarity of the ECF B) atrial natriuretic peptide (ANP) C) increased blood pressure D) increased plasma volume
Drawing a circle with your arm requires your arm to undergo ________
A) circumduction B) abduction C) flexion D) adduction