Which of the following best describes the role of Ca2+ in muscle contraction?
What will be an ideal response?
it binds to troponin, moving tropomyosin, so that myosin heads can bind to actin.
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Which of the following cells have the most mitochondria?
A. Slow oxidative (SO) fibers B. Fast glycolytic (FG) fibers C. Multiunit smooth muscle myocytes D. Single-unit smooth muscle myocytes E. Cardiac myocytes
Digestion of polysaccharides
a. is accomplished using enzymes. b. begins in the mouth c. is finished in the stomach d. both (a) and (b) above. e. both (a) and (c) above.
Which of the following builds new strands of DNA?
A)DNA helicase B)DNA polymerase C)the replication fork D)the lagging strand of DNA E)the leading strand of DNA
The secretion of this male gland is important in activating sperm
A) prostate B) bulbo-urethral glands C) seminal glands