The membrane sarcolemma is found over

In which condition does relaxation occur in muscles?

In which of the following,growth is possible through increase in volume?

Which of the following is not a characteristic feature of the biceps muscle?

Rahul exercises regularly by visiting a gymnasium. Of late,he is gaining weight. What could be the reason? Choose the correct answer and elaborate.
$A$. Rahul has gained weight due to accumulation of fats in the body.
$B$. Rahul has gained weight due to increased muscle mass and loss of fat.
$C$. Rahul has gained weight because his muscle shape has improved.
$D$. Rahul has gained weight because he is accumulating water in the body.

The muscles that move the pinna (ear lobe) in rabbits are .....