Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

enter image description here

I know that the part E in this graph is definitely the part of refractory period.

My question : Will there be any effect on B,C or D if a stimulus is given at time B,CorD respectively ?

share|improve this question
    
If there is a stimulus at E, there will be depolarization (membrane becomes relatively more positive). It is just that no action potential is fired. Therefore, if a strong stimulus does arrive, it will depolarise the membrane to an extent depending on its strength. It will increase the height of the succeeding B phase or decrease the dip of E phase. If it is strong enough, it might persist above the threshold till the refractory period is over, and then an action potential can be fired. –  Satwik Pasani Jan 25 at 17:41
    
@SatwikPasani I'd say that's a great answer, would you like to add it as one? –  jonsca Jul 25 at 2:13

1 Answer 1

up vote 4 down vote accepted

If there is a stimulus at E, there will be depolarization (membrane becomes relatively more positive). It is just that no action potentials are fired. Therefore, if a strong stimulus does arrive, it will depolarize the membrane to an extent depending on its strength. It will increase the height of the succeeding B phase or reduce the dip of the succeeding E phase. If it is strong enough, it might persist above the threshold till the refractory period is over, and then an action potential can be fired.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.