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Question

An example of stretch reflex triggered by passive muscle movement is the

A
Tendon reflex.
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B
Ipsilateral reflex.
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C
Flexor reflex.
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D
Patellar reflex.
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Solution

The correct option is D Patellar reflex.
The contraction of a muscle in response to passive stretching is defined as a stretch reflex. This type of reflex allows the correction of body posture in a timely manner without the involvement of the cerebral cortex, while maintaining the muscle tone at the same time. A well known example of stretch reflex is patellar reflex or knee jerk reflex, i.e., sudden kicking movement of the lower leg in response to a sharp tap on patellar tendon.

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