Sarcoplasm is the

In which of the following functions are white muscles not used?

Given below are two statements $:-$
Statement-$I$ :- Each organised skeletal muscle in human body is made of a number of fascicles,held together by a common connective tissue layer called fascia.
Statement-$II$ :- The portion of the myofibril between two successive '$Z$' lines is considered as the functional unit of muscle contraction,known as a sarcomere.
In the light of the above statements,choose the correct answer from the options given below $:-$

Discuss the difference between red muscle and white muscles.

Muscles are red because of the presence of

Which mineral element is essential for muscle contraction?