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India: Location and Latitudinal-Longitudinal Extent

Is Na+ channe...

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Is Na+ channel a ligan gated channel?

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At the membrane potential when voltage gated Na⁺ channels open, an action potential is sure to fire. This membrane potential is called _____.

Q. Study the following events related to Na and K voltage-gated channels and find the correct combination:

S.No	Channel	Gate	Resting Phase	Depolarised	Hyperpolarized	Repolarisation	Speed of response
A	Na	Activation gate	Closed	Open	Open	Closed	Fast
B	Na	Inactivation gate	Open	Open	Closed	Slow
C	K	Activation gate	Closed	Closed	Open	Open	Slow

Q. Which of these processes occurs during repolarization of nerve fibre?
(i) Open Na

^{+}

channel
(ii) Closed Na

^{+}

channel
(iii) Closed K

^{+}

channel
(iv) Open K

^{+}

At the membrane potential when voltage gated Na⁺ channels open, an action potential is sure to fire. This membrane potential is called _____.

Q. In a myelinated neuron, the voltage gated channels are present in the allowing rapid transmission of action potentials.

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