Write true or false. If false,correct the statement to make it true.
$(a)$ Actin is present in thin filament.
$(b)$ $H$-zone of striated muscle fibre represents both thick and thin filaments.
$(c)$ Human skeleton has $206$ bones.
$(d)$ There are $11$ pairs of ribs in man.
$(e)$ Sternum is present on the ventral side of the body.

The bone of mammals contains Haversian canals which are connected by transverse canals known as

The human skeletal system consists of:

If juvenile hormone is absent when a silkworm moults,it will:

Which of the following is not a function of locomotion?

Study the following sentences:
$I.$ The accumulation of pyruvic acid in the muscle causes fatigue.
$II.$ $ATP$ is resynthesized in the muscle by the phosphorylation of $ADP$ by a phosphogen.
$III.$ Cori cycle involves muscles and liver.
$IV.$ The phosphogen in the vertebrate muscle is arginine phosphate.
The correct set of statements regarding muscle contraction is: