MHT CET Biology question
Which statements are incorrect? I. Synaptic cleft of neurons secrete adrenaline. II. Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. III. Non-myelinated nerve fibre is enclosed by a Schwann cell that does not form myelin sheath. IV. Spinal cord and cranial nerves are made of non-myelinated nerve fibres. Of the four statements.
Answer: (C)
Solution
Statements II and III are correct, while I is incorrect (the synaptic cleft is a gap, not a secreting structure) and IV
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