The figure shows the changes in potential difference across the membrane of a neurone over a period

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The figure shows the changes in potential difference across the membrane of a neurone over a period of time. The membrane was stimulated at time A and time B with stimuli of different intensities.

a. Stimulus B resulted in an action potential. Describe what is occurring at C, D and E.

b. Suggest why stimulus A did not result in an action potential being produced whereas stimulus B did.

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Cambridge International AS And A Level Biology

ISBN: 9781107636828

4th Edition

Authors: Mary Jones, Richard Fosbery, Jennifer Gregory, Dennis Taylor

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Question Posted: Sep 01, 2021 02:06 AM

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The figure shows the changes in potential difference across the membrane of a neurone over a period

Question:

+60- +40- +20- 0- -20- -40 threshold -60 - E -80 2 3 4 Time/ms stimulus stimulus A B Potential difference across membrane of a neurone/mV

Step by Step Answer:

a The resting membrane potential of the membrane of neurons are 80 mV When a stimulus is provided membrane depolarization occurs and the membrane pote...View the full answer

Cambridge International AS And A Level Biology

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