It is known that red muscle fibres in animals | vedclass

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(A) Generally,muscles are of two types: $(1)$ Red muscle,$(2)$ White muscle.Red muscles can work for longer periods because:$(i)$ They contain a red-c

Vedclass · Accepted Answer

They contain high amounts of myoglobin and mitochondria.

Vedclass · Answer

(A) Generally,muscles are of two types: $(1)$ Red muscle,$(2)$ White muscle.Red muscles can work for longer periods because:$(i)$ They contain a red-coloured oxygen-binding protein called myoglobin. Myoglobin stores oxygen in the form of oxymyoglobin,which releases $O_{2}$ during muscle contraction.$(ii)$ They have a high density of mitochondria,which allows for sustained aerobic respiration.$(iii)$ They have a less developed sarcoplasmic reticulum compared to white muscles.$(iv)$ They perform aerobic respiration for longer periods without accumulating significant amounts of lactic acid,thus delaying fatigue.$(v)$ The rate of contraction is slower,allowing for sustained activity,for example,the back muscles in humans.

It is known that red muscle fibres in animals can work for longer periods of time continuously. How is this possible?

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