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Assertion:Reflex arc comprises of at lea...

Assertion:Reflex arc comprises of at least one afferent neuron, one efferent neuron and a part of PNS.
Reason:The efferent neuron receivers signal from a sensory organ and transmits the impulse via a ventral nerve root into the PNS.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
D
The reflex pathway compries at lesast one afferenty neuorn (recptor) and one (efferent or excitor) neuron appropriately arranged in a series. The afferent neuron recevies signal from a sensory organ and transmits the impulse via a dorsal nerve root into the CNS (at the level of spinal cord). The efferent neuron then carries signals form CNS to the effector. The stimulus and response thus forms a reflex arc.
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