The main source of energy during muscle contraction is

In a resting state,the central part of the thick filaments not overlapped by thin filaments is called the .....

Each myofibril of a muscle contains:

Cardiac muscle fibers differ from skeletal muscle fibers in that they are -

Arrange the following steps of muscle contraction in the sequence of events occurring first:
$I.$ Receptor sites on sarcolemma
$II.$ Nerve impulse
$III.$ Release of $Ca^{2+}$
$IV.$ Acetylcholine release
$V.$ Shortening of sarcomere
$VI.$ Synaptic cleft
$VII.$ Spread of impulse over sarcolemma on $T$-tubule
The correct option is:

The largest number of muscles in the human body is found in which region?