The stored food material found in muscles is

Globular head with a short arm and a tail are the two important parts of

Cross arms of the myosin monomer consist of:

Select the correct option for skeletal muscle.
$(I)$ In human body,it is made of a number of muscle bundles.
$(II)$ Muscle bundles contain a number of muscle fibers and each fiber is lined by the sarcolemma.
$(III)$ In a muscle fiber,the sarcoplasm contains only one nucleus.
$(IV)$ In a muscle fiber,the sarcoplasmic reticulum is the storehouse of calcium ions.

Which muscle component is the smallest among the given options?

Which of the following ions is necessary for the contraction of muscles and nerve impulse transmission?