Please Answer these question Q1: All are true about the refractory period EXCEPT

Question

Please Answer these question

Q1: All are true about the refractory period EXCEPT:

A) allows for quick depolarization after Na gates have closed

B) it ensures that the AP goes in one direction

C) occurs in Node of Ranvier after an AP

D) ensures that subsequent AP's are not possible

E) makes it more likely that resting membrane potential is reached

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Q2: GABA works to create inhibitory potentials by opening chloride channels. this means membrane went

A) south

B) neutral

C) positive

D) negative

E) positive then negative

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Q3: Loss of Sympathetic control to a given organ system results in paralysis

A) True

B) False

Explanation / Answer

1Q).

A) allows for quick depolarization after Na gates have closed -------> FALSE (sodium gates are open during depolarization)

B) it ensures that the AP goes in one direction ----> TRUE

C) occurs in Node of Ranvier after an AP ----> TRUE

D) ensures that subsequent AP's are not possible ----> TRUE

E) makes it more likely that resting membrane potential is reached -----> TRUE

Refractory period: During refractory period, the nerve fibre does not respond to the stimuli because the sodium channels are in closed state (depolarisation ends by the closure of sodium channels, without depolarization, the impulse cannot be transmitted).

Irrespective of the intensity of the stimulus, the nerve do not accept any impulses, this period is called as absolute refractory period (the period from the peak of depolarization to the point of reaching resting membrane potential).

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