humn phvs - 1) Which one of the following proteins is...

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1) Which one of the following proteins is important for skeletal muscle contraction but not for smooth muscle contraction? a) Actin, b) Myosin, c) Ca -ATPase, d) Myosin-ATPase , e) Troponin ++ 2) Ca is important in the contraction of smooth muscle. Which of the following is NOT true about ++ smooth muscle contraction? a) Ca binds to calmodulin. ++ b) Ca enters the cytosol from the sarcoplasmic reticulum. ++ c) Contraction is immediately triggered by calmodulin binding. d) MLCK (myosin light chain kinase) forms a complex to activate myosin. e) When MLCK activates myosin, ATPase activity is high and crossbridge formation is active. 3) The regulation of smooth muscle contraction is mediated by the phosphorylation of __________ in response to calcium binding to __________. a) myosin, calmodulin. b) actin, calmodulin. c) troponin, calmodulin. d) myosin, troponin. e) actin, troponin. 4) Which of the following is not an important functional difference between smooth & skeletal muscles ? a) actin and myosin are arranged differently - skeletal muscle => linear, sarcomere based
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This note was uploaded on 12/04/2011 for the course BIO bio 211 taught by Professor Ujhgb during the Spring '11 term at Drexel.

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humn phvs - 1) Which one of the following proteins is...

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