Fill in the blancks
....... muscle fibres are involved in rapid contraction for short duration while ...... muscle fibres are involved in slow contraction for long period.

Fill in the blank In a muscle fibre Ca^(2+) is stored in ………………

Fill in the blancks Dark bands of muscle fibres are made of ........ protein while light bands of muscle fibres are made of ....... proteins.

Which type of muscle fibres show rhythmic contraction?

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:Pigeons and kites can fly for long period without undergoing fatigue. Reason:These birds have white muscle fibres which undergo slow and sustained contraction for long period.

If a muscle undergoes rapid contraction and relaxation ,the sarcoplasmic reticulum extension:

Why a red muscle fibre can work for a prolonged time while a white muscle fibre suffers from fatigue after a short work?

Give the technical terms used for the following: When a muscle is stimulated by an inadequate stimulus, no contraction occurs. If two or more inadequate stimule are given in rapid succession, the muscle contraction is evoked.

Give reason for the following: Contraction of inspiratory muscles causes inspiration while their relaxation causes expiration.