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 .

The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the (a) fovea (b) iris (c ) blind spot (d) optic chaisma

Which of the following statements is correct regarding a myelinated nerve fibre? ,br> (i) It is always associated an axon. (ii) It allows rapid conduction of nerve impulses. (iii) It allows slow conduction of nerve impulses. (iv) It has nodes of Ranvier.

Explain the following processes: (a) Polarisation of the membrane of a nerve fibre. (b) Depolaristion of the membrance of a nerve fibre. (c ) Conduction of nerver impulse along a nerve fibre. (d) Transmission of a berve impulse across a chemical synapse.

Read the statements. A. Preganglionic nerve fibres of III, VII, IX and X cranial nerves are a part of the parasympathetic nervous system B. V, VII, IX and X cranial nerves are mixed nerves C. Trochlear nerves are the largest cranial nerves D. Abducens nerves are sensory in nature which of the above statements are correct ?

List the hormones secreted by the following : (a) Hypothalamus , (b) Pituitary , (c ) Throid, (d) Parathyroid (e ) Adrenal, (f) Pancreas, (g) Testis , (h) Ovary (i) Thymus, (j) Atrium , (k) Kidney, (I) G-I Tract (M) Transmission of a nerve impulse across a chemical synapse