The structural and functional unit of the striated muscle fibre is called

Which contractile protein of skeletal muscle is associated with $ATPase$ activity?

Discuss the difference between red muscle and white muscles.

Which one is not the character of red skeletal muscle?

Contractile tissues have the following features:
$(i)$ Mesodermal in origin
$(ii)$ They contain stretch receptors
$(iii)$ Rhythmic contractions are seen in them
$(iv)$ They do not fatigue during the life of the animal
Which of the above are characteristics of sphincters?

Define the following terms:
$(1)$ Sarcomere
$(2)$ Acromion process