Asked by Amatullah Adams on May 30, 2024
Verified
Which type of neuroglia forms the myelin sheath around some axons of the PNS (peripheral nervous system) ?
A) Schwann cells
B) Astrocytes
C) Satellite cells
D) Oligodendrocytes
E) Ependymal cells
Myelin Sheath
The fatty layer coating and insulating nerve fibers in the central and peripheral nervous systems, speeding up neural signals.
Peripheral Nervous System
The part of the nervous system outside the brain and spinal cord, connecting the central nervous system to limbs and organs.
Neuroglia
Non-neuronal cells in the nervous system that provide support and protection for neurons.
- Discern the diverse types of neuroglial cells and their contributions to the functioning of the nervous system.
- Understand the structure and function of myelin sheath and its implications for nerve impulse conduction.
Verified Answer
MT
Manjinder ThandiJun 04, 2024
Final Answer :
A
Explanation :
Schwann cells form the myelin sheath around some axons of the PNS. The myelin sheath is a fatty insulation that helps in the transmission of nerve impulses. Schwann cells wrap themselves around the axons of neurons and produce the myelin sheath, which is discontinuous along the axon, leaving gaps called nodes of Ranvier.
Learning Objectives
- Discern the diverse types of neuroglial cells and their contributions to the functioning of the nervous system.
- Understand the structure and function of myelin sheath and its implications for nerve impulse conduction.