Question

Nerves that carry impulses toward the CNS only are ________?

1) afferent nerves
2) efferent nerves
3) motor nerves
4) mixed nerves

Answer 1

Nerves that carry impulses toward the CNS only are afferent nerves, also known as sensory nerves. Efferent, or motor, nerves carry impulses away from the CNS. The PNS includes the somatic and autonomic nervous systems, consisting of sensory, motor, and mixed nerves.

Step-by-step explanation:

The nerves that carry impulses toward the CNS only are afferent nerves. These nerves are also known as sensory nerves, and they transmit information from sensory receptors in the body to the central nervous system (CNS). Contrastingly, efferent nerves, or motor nerves, carry impulses away from the CNS to muscles and glands, causing activation. There is also a third type, mixed nerves, which contain both sensory and motor neurons and can transmit information in both directions.

The peripheral nervous system (PNS) is divided into the somatic nervous system and the autonomic nervous system, both of which include these types of nerves. Sensory nerves, motor nerves, and mixed nerves make up the majority of PNS tissues and thus are crucial in the communication between the CNS and the rest of the body.