Medullated and non-medullated nerve fibre.

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 .

What are the types of nerve fibres?

What is nerve?

Vagus nerve is a

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

Write a note on surface fibres.

We can digest fibres.

In a medullated nerve fibre, the conduction of impulse is faster due to the presence of