PATHOLOGY

PATHOLOGY MCQ

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Myelin is a lipid insulation produced by the ____
A
astrocytes
B
ependymal cells
C
microglia
D
oligodendrocytes
Explanation: 

Detailed explanation-1: -Myelin is a lipid rich membrane produced by oligodendrocytes (OLs) in the central nervous system (CNS) and Schwann cells in the peripheral nervous system (PNS). The composition of myelin is approximately 70% lipid and 30% protein, which is in stark contrast to other membranes, which are typically 30–50% lipid (67).

Detailed explanation-2: -In the central nervous system, myelin is formed by multipolar glia, oligodendrocytes, that can extend dozens of slender cell processes to ensheath multiple axons simultaneously.

Detailed explanation-3: -Glial cells are the key element for supporting the messages neurons send and receive all over the body. Much like the insulation around the wires in electrical systems, glial cells form a membraneous sheath surrounding axons called myelin, thereby insulating the axon.

There is 1 question to complete.