21st November 2019


What is the role of the reflex arc?

…functional group known as the reflex arc. Sensory cells carry afferent impulses to a central interneuron, which makes contact with a motor neuron. The motor neuron carries efferent impulses to the effector, which produces the response.

Also know, how does the nervous system work to help with reflexes?

A reflex action often involves a very simple nervous pathway called a reflex arc. A reflex arc starts off with receptors being excited. They then send signals along a sensory neuron to your spinal cord, where the signals are passed on to a motor neuron. As a result, one of your muscles or glands is stimulated.

What is a reflex action and how does it work?

When sensory neurons trigger the motor neurons in the reflex arc to pull your hand back, they also stimulate interneurons in your spinal cord (#3 in the figure). They carry sensory information to your brain where it is processed and interpreted as "HOT!

What are the main components of the reflex arc?

  • Receptor - sense organ in skin, muscle, or other organ.
  • Sensory neuron - carries impulse towards CNS.
  • Interneuron - carries impulse within CNS.
  • Motor neuron - carries impulse away from CNS.
  • Effector - structure by which animal responds (muscle, gland, etc).
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