In-Text Figure Based Questions
-In the facilitated diffusion of glucose, what determines the direction in which glucose molecules will betransported? (Figure 3-18)
A)______the amount of ATP available inside the cell versus outside the cell
B) the amount of sodium available to bind inside the cell versus outside the cell
C) the concentration gradient
D) the voltage of the membrane
E) the tonicity of the cell

Question

Quizplus · Accepted Answer

The direction of facilitated diffusion of glucose is determined by the concentration gradient, which is the difference in concentration of glucose between the inside and outside of the cell. Glucose will move down its concentration gradient from an area of high concentration to an area of low concentration. Factors such as ATP, sodium, membrane voltage, and tonicity are not directly involved in the direction of glucose transport in facilitated diffusion.