Question

how muscles are able to contract and relax to bring about movement​

Answer 1

Answer:

hope this helps

Explanation:

A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.

Answer 2

Answer:

Muscles contain special proteins called contractile proteins, which contract and relax to cause movements

Explanation:

MARK BRAINLIEST