Which component can olny be found in the peripheral nervous system? Sensory neurons,spinal cord,dendrites,axons
Sensory neurons can only be found in the peripheral nervous system. The peripheral nervous system consists of nerves and ganglia that are outside of the brain and spinal cord. Sensory neurons transmit signals from sensory receptors (such as in the skin or sense organs) to the central nervous system (brain and spinal cord).
The component that can only be found in the peripheral nervous system is sensory neurons.
The component that can only be found in the peripheral nervous system (PNS) is sensory neurons. To understand this, let's break down each option and see where they are found:
1. Sensory neurons: Sensory neurons are responsible for transmitting information from sensory receptors (such as those in the skin, eyes, and ears) to the central nervous system (CNS). They are primarily located in the PNS and transmit sensory information to the CNS.
2. Spinal cord: The spinal cord is a long, thin, tubular bundle of nerves that is part of the CNS. It extends from the base of the brain down to the lower back. The spinal cord is responsible for relaying signals between the brain and the PNS and also acts as a reflex center.
3. Dendrites: Dendrites are branching extensions of nerve cells (neurons) that receive signals from other neurons. Dendrites can be found in both the CNS and PNS. They receive input from other neurons and transmit this information towards the cell body.
4. Axons: Axons are long, thread-like extensions of neurons that carry electrical signals away from the cell body to other neurons or effector cells (such as muscles or glands). Axons can be found in both the CNS and PNS.
In summary, while sensory neurons are exclusively found in the PNS, the other components mentioned (spinal cord, dendrites, and axons) can be found in both the CNS and PNS.