The single-unit smooth muscles are:

The central part of the thick filament which is not overlapped by thin filaments is called as:

$A-$ Actin filaments occur in two forms: the monomeric $G$-actin and the polymeric $F$-actin.
$R-$ Tropomyosin is a rod-shaped fibrous protein. Tropomyosin forms two helical strands,which are wrapped around the $F$-actin filaments.

$A$ motor unit is also known as:

$ATP$ binding site is located on the

At which site do muscle fibers receive stimulation from a motor neuron?