Lab activity - Knee Jerk Reflex (Reflex Action) — task. Biology CBSE Live product, Class 10 (2026-27).

Identify the correct choice among the following.

In the knee reflex activity, why does the leg move forward?

1. What happens to the muscle during this response?

It contracts
It relaxes
It spins
No space exists between particles

2. What triggers this contraction?

Nerve impulse from the spinal cord
Nerve impulse to the spinal cord
Solid layers
Nerve impulse to the brain

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