Question

this type of movement occurs due to contraction of the contractile proteins within the muscles."

Answer 1

Muscle Contraction. Contractile proteins of muscle are actin and myosin, the main components of the thin and thick filaments, respectively. ...During contraction, the myosin head attaches to its binding site (B). The thin filaments extend from the Z lines; they are formed by the actin molecules twisted in a helix.

Answer 2

✌️✌️ hey mate,

➡️MUSCULAR MOVEMENT occurs due to contraction of the contractile proteins Within the muscles.

thanks....
nice to help you ✌️✌️