Zoology - Locomotion and Movement Question with Solution | TestHub
ZoologyLocomotion and MovementLocomotionEasy2 minPYQ_2012
ZoologyEasysingle choice
During muscular contraction, which of the following events occur? (i) H-zone disappears (ii) A band widens (iii) I band reduces in width (iv) Width of A band is unaffected (v) M line and line come closer.
Options:
Answer:
A
Solution:
Muscle contraction is brought about by sliding of the actin filaments over myosin filaments. When a muscle fibril contracts, its A band remains constant and I band shortens. zone also disappears as the actin filaments of both sides in each sarcomere may overlap each other at M line.
Stream:AIIMSSubject:ZoologyTopic:Locomotion and MovementSubtopic:Locomotion
⏱ 2mℹ️ Source: PYQ_2012
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