Question

define reflex arc with example

Answer 1

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.

Answer 2

Reflex action in an involuntary action by the body to external stimuli, in which we cannot control ourselves. Reflex actions often bypass the brain altogether to occur very quickly. There are a number of different reflex pathways in the body. A classic example of a reflex pathway can be observed by touching a hot object. Whenever our hand touches a hot object, it triggers a reflex. Signals from the stimulus are transmitted to the spinal cord along the reflex pathway and the spinal cord activates motor neurons, causing the hand to pull away from the hot object.
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