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When a -neuron is in resting state i.e n...

When a -neuron is in resting state i.e not conducting any impulse , the axonal membrane is:

A

Comparatively more permeable to` K^+ ions` and nearly impermeable to` Na^+ions`.

B

Comparatively more permeable to `Na^+` ions and nearly impermeable to `K^+`ions

C

Equally permeable to both `Na^+` and `K^+` ions

D

Impermeable to both `Na^+` and `K^+` ions

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Assertion:The resting membrane of the neuron exhibits polarity of charges Reason:The outer surface of the axonal membrane possesses a negative charge while its inner surface becomes positively charged.

The membrane potential return to its original resting state when K^+ ions channels close completely.

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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 nerve impulse across a chemical synapse.

Read the given paragraph. In the resting state, the axonal membrane is ___ with more ___ charged ions outside than inside.This unequal distribution of ions is due to (1) the selective permeability of the membrane, which forms an almost impenetrable barrier to _____ and (2) the action of the ____, which pumps _____ Na^(+) out of the neuron for every ____ K^+ brought in. Select the option that correctly fills the blanks in the paragraph.

Complete the following paragraph by selecting the option that gives correct sequence of words. When a stimulus is applied at a site on the polarised membrane, the membrane at that site becomes freely permeable to (i) ions.It causes rapid influx of (ii) leading to (iii) of the membrane.

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