Asked by Onaiz Fahim on May 20, 2024
Verified
The spinal cord is composed of two distinct types of tissue.One type of tissue is composed of the cell bodies of neurons,which do not have myelin on their axons.This tissue in the spinal cord is called
A) substantia nigra.
B) gray matter.
C) nucleus accumbens.
D) white matter.
Gray Matter
A component of the central nervous system consisting primarily of neuronal cell bodies, dendrites, and unmyelinated axons, involved in muscle control and sensory perception.
Spinal Cord
A long, thin, tubular structure made of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region in the vertebral column, conducting neural signals between the brain and the body.
Myelin
A fatty substance that surrounds the axons of many neurons, facilitating rapid signal transmission.
- Comprehend the fundamental architecture and role of neurons, along with their communication mechanisms.
Verified Answer
NU
Nimra UsamaMay 27, 2024
Final Answer :
B
Explanation :
Gray matter in the spinal cord is composed of neuron cell bodies, dendrites, and axon terminals, where there is little or no myelination. This contrasts with white matter, which is made up of myelinated axons, hence the difference in color and function.
Learning Objectives
- Comprehend the fundamental architecture and role of neurons, along with their communication mechanisms.