Insulin stimulates an increase in number of glucose carrier proteins at a cell membrane's surface.What effect will insulin have on cell function? Choose all that apply.
A)An increase in insulin,which will increase the diffusion rate.
B)ATP amounts needed for this transport will increase.
C)Low insulin levels will decrease the number of available carrier proteins.
D)Lack of membrane receptors for insulin will decrease amount of glucose taken in.

Question

Quizplus · Accepted Answer

A) Insulin increases the number of glucose transporters on the cell membrane, facilitating more glucose to enter the cell by diffusion, thus increasing the diffusion rate. C) Low insulin levels lead to fewer glucose transporters being present on the cell membrane, reducing glucose uptake. D) If a cell lacks receptors for insulin, it cannot respond to insulin, leading to fewer glucose transporters on the membrane and decreased glucose uptake. B is incorrect because the transport of glucose into cells via insulin-stimulated glucose transporters (such as GLUT4 in muscle and adipose tissue) does not require ATP; it is a form of facilitated diffusion, which does not use energy.

Insulin Stimulates an Increase in Number of Glucose Carrier Proteins