NEET2018Zoology-Muscular System
NEET 2018 Zoology Muscle Contraction MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Calcium is important in skeletal muscle contraction because it
A
detaches the myosin head from the actin filament.
B
activates the myosin ATPase by binding to it.
C
binds to troponin to remove the masking of active sites on actin for myosin.
D
prevents the formation of bonds between the myosin cross bridges and the actin filament.
Correct Answer
Option C
Detailed Explanation
Calcium binds to troponin, causing a conformational change that exposes active sites on actin, allowing myosin to bind and muscle contraction to occur.
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