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 reason for the following statements: White muscle fibres undergo early fatigue.

Name the pigment present in red muscle fibres.

Why are the striated muscle fibres called visceral muscle fibres?

Write true or false: Red muscles are slow acting while white muscles are fast acting.

Why are the smooth muscle fibres called visceral muscle fibres?

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

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.

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.