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Locomotion and Movement question

2018 · Q14
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Locomotion and Movement question

2018 · Q14

NEETBiologyLocomotion and MovementMCQ+4 / −1
Calcium is important in skeletal muscle contraction because it
  1. A
    detaches the myosin head from the actin filament
  2. B
    binds to troponin to remove the masking of active sites on actin for myosin
  3. C
    prevents the formation of bonds between the myosin cross bridges and the actin filament.
  4. D
    activates the myosin ATPase by binding to it
View written solutionFree

Correct answer: B

The sarcoplasmic reticulum to release calcium ions into the muscle interior where they bind to troponin, thus causing tropomyosin to shift from the face of the actin filament to which myosin heads need to bind to produce contraction.

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