PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What muscle movement occurs when you move your hand from an open palm to a fist?
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Adduction
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Abduction
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Flexion
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Extension
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Explanation:
Detailed explanation-1: -Rotation-A spin about an axis. The ability of the wrist to move the hand from the palm up to the palm down position is due to the rotation of the joint at the wrist.
Detailed explanation-2: -Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow or moving the wrist to move the hand toward the forearm are examples of flexion. Extension is the opposite of flexion in that the angle between the bones of a joint increases.
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