Which of the following is $NOT$ a function of the skeletal system?

Which teeth fall out in mammals?

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.

Which of the following is not a function of locomotion?

Locomotion requires a perfectly coordinated activity of:

$A$: On repeated application of stimuli,involuntary striped muscles undergo fatigue.
$R$: This is due to non-availability of $ATP$ molecules.