$I-$bands of myofibrils are bisected by

The Achilles tendon is associated with which of the following muscles?

Name the ions responsible for unmasking the active sites on myosin for cross-bridge formation during muscle contraction.

Define the sliding filament theory of muscle contraction.

The myosin binding site is located on ..........

Which of the following statements are false regarding the muscle structure?
$I.$ In the centre of each $I$-band is an elastic fibre ($Z$-line) which bisects it.
$II.$ Thin filaments are firmly attached to the $Z$-line.
$III.$ $M$-line is a fibrous membrane in the middle of $A$-band.
$IV.$ $A$ sarcomere comprises one full $A$-band and two half $I$-bands.