What is the term for straightening a limb at a joint, increasing the angle between bones?
adduction
extension
abduction
flexion
The Correct Answer is B
Rationale:
A. Adduction refers to moving a limb toward the midline of the body, not straightening a joint.
B. Extension involves straightening a limb at a joint, which increases the angle between the bones, such as straightening the elbow or knee. This movement is essential for proper body mechanics and functional mobility.
C. Abduction involves moving a limb away from the midline of the body and does not increase the joint angle.
D. Flexion is the opposite of extension; it decreases the angle between two bones, such as bending the elbow or knee.
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Related Questions
Correct Answer is {"dropdown-group-1":"A"}
Explanation
Rationale:
A. Dorsiflexion is the movement of the toes or foot upward toward the shin. It decreases the angle between the dorsum of the foot and the leg.
B. Inversion is turning the sole of the foot inward, so it faces toward the midline of the body.
C. Plantar Flexion is pointing the toes downward, away from the shin, as in standing on tiptoes.
D. Eversion is turning the sole of the foot outward, away from the midline.
Correct Answer is A
Explanation
Rationale:
A. Smooth muscle (found in organs and vessels) and cardiac muscle (in the heart) function involuntarily under the autonomic nervous system. Skeletal muscle, on the other hand, is under voluntary control through the somatic nervous system.
B. This would be incorrect because skeletal muscle is not involuntary, and smooth/cardiac muscles are not voluntary.
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