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Question

Match the following columns.

Column IColumn IIAFast muscle fibres1MyoglobinBSlow muscle fibres2Lactic acidCActin filament3Contractile unitDSarcomere4I - band


Your Answer
A
A-1, B-2, C-4, D-3
Your Answer
B
A-2, B-1, C-3, D-4
Correct Answer
C
A-2, B-1, C-4, D-3
Your Answer
D
A-3, B-2, C-4, D-1

Solution

The correct option is C A-2, B-1, C-4, D-3
Fast muscles fibres contract spontaneously and reach anaerobic conditions in shorter time,and produce more lactic acid.

Slow muscle fibres have better ability to endure, as they are resistant to fatigue and contract slowly, it is because of accumulation of large amount of myoglobin in them.

I band of myofibril has actin filaments only.

Sarcomere is the contractile unit of skeletal muscle.

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