Read the following statements carefully and find out the correct ?
(1) A single schwann cell forms myelin around one and only one axon, while a single oligodendrocyte forms myelin around several separate axons.
(2) During an action potential, influx of Na⁺ in axon interior will exceed the external Na⁺ concentration.
(3) During inhibitory synaptic potential (IPSP) external K⁺ concentration rise until it exceeds the internal K⁺.
(4) Unmyelinated axons generally have a lesser diameter than myelinated axons.
1 and 4 only
Correct → Schwann = one axon, Oligodendrocyte = many axons
Incorrect → Na⁺ does NOT exceed outside concentration
Incorrect → K⁺ moves OUT, does not exceed inside concentration
Correct → Unmyelinated axons have smaller diameter
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