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Medullated and non-medullated nerve fibr...

Medullated and non-medullated nerve fibre.

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Read the given statements and select the correct option. (i)Synaptic cleft of neurons secreates 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 a myelin sheath. (iv)Spinal and cranial nerves are made of non-myelinated nerve fibres.

Distinguish between : (a) afferent neurons and efferent neurons (b) impulse conduction in an myelinated nerve fibre and unmyelinated nerve fibre (c ) aqueous humour and vitreous humor (d) blind spot and yellow spot (f) cranial nerves and spinal nerves .

Knowledge Check

  • ……….. is formed of loose connective tissue containing nerves, blood. lymph vessels and sympathetic nerve fibres that control the secretions of intestinal juice.

    A
    Serosa
    B
    Sub- mucosa
    C
    Mucosa
    D
    Muscularis

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