Question

What are responsible for contraction & relaxation in muscles ?

a. Carbohydrates

b. Amylase

c. Contractile proteins

d. Sucrose​

Answer 1

Answer:

Skeletal muscles are involved in contraction and relaxation. An action potential travels through the motor neuron. The motor neurons are linked to the muscle fibers at the neuromuscular junction. When this nervous signal reaches the neuromuscular junction the neurotransmitter called acetylcholine is released.