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.

By which, Hydra conducts nerve impulse and stimulation ? (A) Nervenet (B) Nematocytes (C) Sensory cells (D) Nerve cells

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 .

Neuromuscular junction is synapse like gap between nerve ending and muscle fibre.

A nerve fibre contains a membrane separating two conducting fluids maintained at a potential difference. What is the order of this potential difference.

Which of the following option is correct for the statement 'X' and 'Y'? Statement 'X' : Immediately after repolarization, ionic imbalance is created on both the sides of nerve fibre. Statement 'Y' : During repolarization K^(+) ion channel open up and K^(+) ion moves on innerside of plasma membrane. Options :

The concentration of potassium ions inside a biological cell is at least 20 times higher than outside. The resulting potential difference across the cell is important in several processes such as transmission of nerve impulses and maintaining the ion balance. A simplel model for a concentration cell involving a metal M is M(s)|M^(o+)(aq,0.05 molar )||M^(o+)(aq,1 molar )|M(s) For the abov electrolytic cell, the magnitude of the cell potential is |E_(cell)|=70mV. For the above cell