Answer: e) calcium ions—ions bound to the myosin protein that play a role in muscle contraction and relaxation
Which of the following elements of the sliding-filament model of muscle contraction is incorrectly defined?
a) tropomyosin—a regulatory protein
b) troponin complex—a set of additional regulatory proteins
c) transverse tubules—infoldings of the plasma membrane
d) sarcoplasmic reticulum—a specialized endoplasmic reticulum
e) calcium ions—ions bound to the myosin protein that play a role in muscle contraction and relaxation
Biology & Microbiology
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