Zoology-Muscle Contraction
NEET Zoology Muscle Contraction Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 11
Assertion (A): Calcium ions are released into the sarcoplasm upon receiving a neural signal. | Reason (R): Calcium binds with tropomyosin to expose active sites on actin filaments.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option C
Detailed Explanation
The assertion is true as calcium ions are indeed released into the sarcoplasm upon receiving a neural signal. However, the reason is false because calcium binds with a subunit of troponin, not tropomyosin, to expose active sites on actin filaments.
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