Which component can olny be found in the peripheral nervous system?axons,dendrites,spinalcord,sensoryneurons
The spinal cord can only be found in the peripheral nervous system. Axons, dendrites, and sensory neurons can be found in both the peripheral and central nervous systems.
The component that can only be found in the peripheral nervous system is sensory neurons.
To understand why this is the case, let's first define the terms mentioned in the question:
- Axons: These are long, slender projections of nerve cells (neurons) that transmit electrical impulses away from the cell body to other neurons, muscles, or glands.
- Dendrites: These are branching extensions of neurons that receive electrical impulses from other neurons and transmit them toward the cell body.
- Spinal cord: This is a long, thin, tubular bundle of nervous tissue that extends from the base of the brain down to the lower back. It serves as a pathway for signals traveling between the brain and the rest of the body.
- Sensory neurons: These are specialized neurons that transmit sensory information from sensory organs (e.g., eyes, ears, skin) to the central nervous system (brain and spinal cord).
Now, getting back to the question, both axons and dendrites are found throughout the entire nervous system, including in both the central nervous system (brain and spinal cord) and the peripheral nervous system (nerves outside of the brain and spinal cord).
The spinal cord, on the other hand, is part of the central nervous system that extends from the brain to the lower back.
However, sensory neurons are unique because they are found exclusively in the peripheral nervous system. These neurons are responsible for transmitting sensory information (such as touch, temperature, pain, and pressure) from sensory organs to the central nervous system for processing.
So, to answer your question, the component that can only be found in the peripheral nervous system is sensory neurons.