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Q: Which cells , also called neurilemma cells , are the main glial cells in the PNS and play an essential role in the existence and functioning of neurons?
  • A. Photoreceptor cells
  • B. Ganglion cells
  • C. Bipolar cells
  • D. Schwann cells
Correct Answer: Option D - Schwann cells , also called neurilemma cells, are the principal glial cells in the Peripheral Nervous system (PNS) and are crucial for the survival and function of neurons. They form the myelin sheath around the axons of neurons, which is essential for the rapid transmission of nerve impulses. Myelin sheath protects the axons. These cells are named after German physiologist Theodor Schwann.
D. Schwann cells , also called neurilemma cells, are the principal glial cells in the Peripheral Nervous system (PNS) and are crucial for the survival and function of neurons. They form the myelin sheath around the axons of neurons, which is essential for the rapid transmission of nerve impulses. Myelin sheath protects the axons. These cells are named after German physiologist Theodor Schwann.

Explanations:

Schwann cells , also called neurilemma cells, are the principal glial cells in the Peripheral Nervous system (PNS) and are crucial for the survival and function of neurons. They form the myelin sheath around the axons of neurons, which is essential for the rapid transmission of nerve impulses. Myelin sheath protects the axons. These cells are named after German physiologist Theodor Schwann.