Question

What is the pathway followed for the transmission of impulses by afferent nerve fibers?

Answer 1

Afferent nerve fibers:

1. Afferent or sensory fibers transmit impulses from our sense organs to the central nervous system.
2. Motor nerve fibers conduct impulses away from the central nervous system.
3. Visceral fibers innervate internal organs such as the heart and intestines, and body fibers innervate body wall structures such as the skin.

The transmission of impulses by afferent nerve fibers is as follows:

From the central nervous system to the muscles:

1. The peripheral nervous system consists of 12 pairs of cerebral nerves that connect to the brain and 31 pairs of spinal nerves that connect to the spinal cord.
2. Sensory nerves transmit information from the body's receptors to the central nervous system.
3. Motor nerves carry information from the central nervous system to muscle fibers.

From the central nervous system to receptors:

1. Receptors are a group of specialized cells that detect environmental changes (stimulations) and respond to electrical stimuli.
2. The organ of consciousness contains a group of receptors that respond to specific stimuli.
3. Based on sensory input and integration, the nervous system signals muscles to contract or contact glands, causing secretions.
4. Effectors produce effects in response to stimuli from the CNS, muscles, and glands are the primary examples of effectors.

Central Nervous System Receptors:

1. Our nervous system processes this information, so the body will react quickly.
2. The response is a change in the part of the organism caused by the stimulus.
3. It is important to note that it is not driven by a stimulus but only acts as a trigger.