Reflex Arc Polysynaptic

A reflex arc is the path along which a nerve impulse travels from a receptor to an effector. It consists of several elements: receptors, interneurons and effectors. The polysynaptic reflex arc (PSA) has one or more interneurons.

Interneurons are neurons that are located between receptors and effectors. They play an important role in the transmission of nerve impulses. Interneurons can have different numbers of dendrites and axons.

The reflex arc is more complex than the reflex arc without interneurons. This is because each interneuron can have multiple axons that go to different effectors. For example, if the receptor is located on the skin, then the neurons transmitting impulses from it can go through interneurons to the muscles or glands.

Thus, a reflex arc with several interneurons is more complex and allows information to be transmitted from one receptor to several effectors. It is important for regulating many body functions such as breathing, digestion and others.