The picture below shows 4 different electrochemical gradients (A, B, C, D) across a membrane which contains pores that, when open, allow the indicated ion to diffuse through the membrane:
Which gradient(s) provide the strongest driving force for the NET diffusion of that particular ion across the membrane (in either direction) when the pore is open (circle all that apply above)?
Homework Answers
Answer: Options A, B, and C
are correct
Explanation:
Gradient = The difference in concentration across a membrane
In the given case, the gradient across the membrane and their
direction of movements are indicated.
A: 12 ----> 1
B: 12 ----> 1
C: 12 ----> 1
D: 12 <---> 12
The gradient is same in A, B, and C.
There is no gradient in D.
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