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Neuron

what is the r...

Question

what is the reason for delayed closing of k+ voltage gated ion channels (resulting in hyperpolarization)

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Solution

due to its structural arrangement.

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Q. Match the following stages of action potential to its corresponding state of ion movement

I. Depolarization stage (p). (K⁺) ions move outside the cell
II. Repolarization stage (q). (Na⁺) ions move inside the cell
III. Hyperpolarization stage (r). No net ion movement
IV. Resting stage (s). (K⁺) ions move into the cell
V. Threshold potential (t). Ligand gated sodium channels open
VI. Stimulus reaches the neuron (u). Voltage gated sodium channels open

Q. Match the following stages of action potential to its corresponding state of ion movement

I. Depolarization stage (p). (K⁺) ions move outside the cell
II. Repolarization stage (q). (Na⁺) ions move inside the cell
III. Hyperpolarization stage (r). No net ion movement
IV. Resting stage (s). (K⁺) ions move into the cell
V. Threshold potential (t). Ligand gated sodium channels open
VI. Stimulus reaches the neuron (u). Voltage gated sodium channels open

Q. If the 'Inactivation gates of sodum' are closed and 'potassium voltage gated channels' are open, in what phase is what phase is the 'action potential' in your body?

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

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