STANDARDZoology-Muscle Physiology
STANDARD Zoology Sarcomere Structure MCQ Question
Type: MCQ-conceptual-Medium
Electron microscopic studies of the sarcomeres have revealed that during muscle contraction
A
The width of A-band remains constant
B
The width of the H-zone becomes larger
C
The width of I-band increases
D
The diameter of the fibre increases
Correct Answer
Option A
Detailed Explanation
During muscle contraction, the length and width of the A-band remain constant. The width of the I-band reduces, the diameter of the fiber decreases, and the width of the H-zone becomes smaller.
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