ANATOMY
MUSCULOSKELETAL AND SOFT TISSUE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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contract and relax
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contact and reflex
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cringe and remove
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None of the above
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Detailed explanation-1: -Skeletal muscles contract and relax to mechanically move the body. Messages from the nervous system cause these muscle contractions.
Detailed explanation-2: -Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can’t push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
Detailed explanation-3: -Muscles that are under the control of the will of an individual are voluntary muscles or skeletal muscles or striated muscles. For example the muscles in your arms move only when you want. Such muscles constitute about 50 percentage of the body weight.
Detailed explanation-4: -Relaxation: Relaxation occurs when stimulation of the nerve stops. Calcium is then pumped back into the sarcoplasmic reticulum breaking the link between actin and myosin. Actin and myosin return to their unbound state causing the muscle to relax.