Question

The white matter of the spinal cord contains
A.Nerve axons
B.Cell bodies
C.Clusters of neurons and cell bodies
D.Motor neurons

Answer 1

Hint:The white matter which lies beneath the gray matter cortex is composed of the millions of bundles of nerve axons that connect neurons in different regions of the brain into the functional circuits.
The white color derives from the electrical insulation that coats the axons.

Complete step by step answer:The white matter is the component of the central nervous system.
 In the brain and the spinal cord, it consists of mostly glial cells and the myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centers.
Therefore, the correct answer is option A.

Additional information:
Nerve axons: This is the long slender projection of a nerve cell that conducts electrical impulses away from the neuron's cell body.
Axons are in effect the primary transmission lines of the nervous system and as bundles, they help to make up nerves.
Cell bodies: The cell bodies are the spherical part of the neuron that contains the nucleus and connects to the dendrites which bring information into the neuron, and the axon and which sends information to other neurons.
The job of the cell bodies is to control all of the functions of the cell.
Clusters of neurons and cell bodies: The clusters of cell bodies in the central nervous system are called the nuclei, while the cell bodies lining the nerves in the peripheral nervous system are called the ganglia.
Motor neurons: The motor neurons of the spinal cord are part of the central nervous system and connect to the muscles, glands, and organs throughout the body.
These neurons transmit impulses from the spinal cord to the skeletal and smooth muscles and so directly control all of our muscle movements.

Note:The white matter disease is the disease that affects the nerves that link various parts of the brain to each other and the spinal cord.
These nerves are also called white matter.
The white matter disease causes these areas to decline in their functionality.
This disease is also referred to as leukoaraiosis.