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WorksheetsNerve Fibers and Myelination Quiz
Total questions: 15
Worksheet time: 8mins
What is the function of the myelin sheath in nerve fibers?
Nutrition at nodes of Ranvier
Regeneration after injury
Formation of Schwann cells
Insulation and protection
Which type of nerve fibers are enveloped by Schwann cell sheath only in the PNS?
Myelinated nerve fibers
Unmyelinated nerve fibers
Central nerve fibers
Mixed nerve fibers
What is the function of the Schwann cell sheath in nerve fibers?
Formation of myelin
Insulation and protection
Fast conduction of nerve impulse
Regeneration after injury
Where are unmyelinated nerve fibers mainly present?
Mixed nervous system
Autonomic nervous system
Peripheral nervous system
Central nervous system
What is the main difference between myelinated nerve fibers in the PNS and CNS?
Formation of myelin sheath
Location of cell body
Presence of Schwann cells
Absence of neurilemma
Which cells form the myelin sheath in the CNS?
Schwann cells
Oligodendrocytes
Fibroblasts
Neurons
What is the function of the endoneurium in a peripheral nerve?
Insulation and protection
Formation of myelin
Nutrition of axon
Surrounding each nerve fiber separately
What is the main function of the perineurium in a peripheral nerve?
Forming the blood nerve barrier
Formation of myelin
Insulation and protection
Regeneration after injury
What is the structure of a myelinated nerve fiber when stained with H&E stain?
Schwann cells lie on the myelinated axon
Neurilemma forms the outer layer
Only myelin sheath is stained
Central eosinophilic axon surrounded by empty space
What is the main function of the epineurium in a peripheral nerve?
Insulation and protection
Regeneration after injury
Covering the nerve trunk from outside
Formation of myelin
Which type of nerve fibers are enveloped by myelin sheath without neurilemma in the CNS?
Central nerve fibers
Myelinated nerve fibers
Unmyelinated nerve fibers
Mixed nerve fibers
What is the main difference between Schwann cells and oligodendrocytes in myelination?
Number of axons enveloped
Presence of neurilemma
Formation of myelin sheath
Location of cell body
What is the main function of the Schwann cell sheath in unmyelinated nerve fibers in the PNS?
Insulation and protection
Regeneration after injury
Nutrition at nodes of Ranvier
Formation of myelin
What is the main function of the oligodendrocytes in myelination in the CNS?
Formation of myelin
Insulation and protection
Regeneration after injury
Nutrition at nodes of Ranvier
What is the main function of the neurilemma in nerve fibers?
Insulation and protection
Formation of myelin
Regeneration after injury
Nutrition of the axon
