The muscle which moves a body part away from the midline of the body is:
Correct answer: D. Abductor muscles
- A. Flexor muscles
- B. Extensor muscles
- C. Adductor muscles
- D. Abductor muscles
Explanation
Option D is the correct option because an abductor muscle is any of the muscles that cause movement of a limb away from the midplane of the body or away from a neighbouring part or limb.Option A is not correct because a flexor muscle is any of the muscles that decrease the angle between bones on two sides of a joint, as in bending the elbow or knee.Option B is not correct because an extensor muscle is any of the muscles that increase the angle between members of a limb, by straightening the elbow or knee.Option C is not correct because the adductor muscle whose contraction moves a limb or other part of the body towards the midline of the body or another part.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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