Locomotion and ...

Collagen is a

Which of the following is a contractile protein of a muscle?

Which of the following statements about the mechanism of muscle contraction are correct?

A. Acetylcholine is released when the neural signal reaches the motor end plate.

B. Muscle contraction is initiated by a signal sent by CNS via a sensory neuron.

C. During muscle contraction, the isotropic band gets elongated.

D. Repeated activation of the muscle can lead to accumulation of lactic acid.

The contractile unit of muscle is a part of myofibril between

Read the statements carefully and comment on them.

A. A bands of muscle fibre are dark and contain myosin.

B. I bands of muscle fibre are light and contain actin.

C. During muscle contraction, the A bands contract.

D. The part between two Z lines is called sarcomere.

E. The central part of the thin filament not overlapped by the thick filament is the H zone.

 Which category of muscle does not get tetanised?

Cyclosis is a characteristic of plant cells like Amoeba and vertebrate WBCs. This movement is due to

ATPase enzyme needed for muscle contraction is located in

The only immediate source of energy for muscular contraction is

Which one of the following is the correct pairing of a body part and the kind of muscle tissue which moves it?