Assertion` :` During muscle contraction I-band and A-band get reduced.
Reason `:-` During contraction thin filament slides over myosin filament.

During muscle contraction, actin and myosin ffrom

During muscle contraction, actin and myosin ffrom

During muscle contraction Z-lines get closer.

Assertion : In muscle contraction, length of both A-bands and I-bands decrease. Reason : Both myosin of A-band and actin of I-bands are contractile proteins and decrease in size during muscle contraction.

Assertion :- When the muscle fibre contracts, sacromere length is reduced. Reason :- Sliding of myosin filament occurs due to rotational movement of myosin head.

Assertion :- When the muscle fibre contracts, sacromere length is reduced. Reason :- Sliding of myosin filament occurs due to rotational movement of myosin head.

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:In muscle contraction,length of both A-bands and I-bands decrease. Reason:Both myosin of A-bands and actin of I-bands are contractile proteins and decrease in size during muscle contraction.

Mechanism OF Muscle Contraction || Sliding Filament Theory

A band contain ……………. filaments while I contains ……………... filaments.