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Which sequence of message flow in a reflex arc is correct?

Answer and explanation

Correct answer: Receptor then sensory nerve then spinal cord then motor nerve then effector

The governing concept is the direction of information flow in a reflex arc. A receptor first detects the stimulus. The sensory nerve carries the impulse to the spinal cord, which coordinates the rapid response; a motor nerve then carries the command to the effector, such as a muscle. Thus A gives the correct sequence. The other options reverse stages or incorrectly insert blood, hormones or an unsuitable order.

Related tags

Reflex ArcSpinal CordNervous SystemReflex ActionControl And CoordinationScienceClass 10 Mcq

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