In the resting state,a subunit of troponin masks the active binding sites for .......... on the .......... filaments.

Give scientific reasons: Striated muscles get fatigued rapidly.

Select the correct option for the following statements:
$(i)$ The most important respiratory organ in frogs is the skin / lungs.
(ii) Skeletal muscle / Cardiac muscle exhibits rhythmic contraction.

The largest number of muscles in the human body is found in which region?

Which type of muscles are responsible for the movement of the pinna in humans?

Identify the odd one out from the following list.