You measure the membrane potential and find that it does not change from time X to time Y. However, you find that current across the membrane has increased by a factor of 4 from time X to time Y. Which of the following most likely happened between time X and Y?      a. 4 times as many ion channels closed on the cell membrane     b. Resistance of the membrane changed to ½     c, Resistance of the membrane changed to ¼   d. not enough information

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Question 5

You measure the membrane potential and find that it does not change from time X to time Y. However, you find that current across the membrane has increased by a factor of 4 from time X to time Y. Which of the following most likely happened between time X and Y? 

 

  a.

4 times as many ion channels closed on the cell membrane

 

  b.

Resistance of the membrane changed to ½

 

  c,

Resistance of the membrane changed to ¼

  d.

not enough information

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