NEET PG DENTAL EXAM

HISTOLOGY

NERVOUS TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
White matter in the CNS gets its whitish color of some neurons is caused by the presence of:
A
sodium
B
potassium
C
myelin
D
ganglia
Explanation: 

Detailed explanation-1: -White matter is found in the deeper tissues of the brain (subcortical). It contains nerve fibers (axons), which are extensions of nerve cells (neurons). Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.

Detailed explanation-2: -White matter refers to the areas of the CNS which host the majority of axons, the long cords that extend from neurons. Most axons are coated in myelin-a white, fatty insulating cover that helps nerve signals travel quickly and reliably.

Detailed explanation-3: -Myelin provides white color to the white matter. White matter comprises relatively few cell bodies and is composed essentially of long-range myelinated axons. The whiteness of myelin creates the color difference between both these matters.

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