Multiple Choice
What is the term for the diffusion of water across a semipermeable membrane?
14. Solutions
Osmosis
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Which of the following factors will not speed up the net rate of diffusion for glucose into a cell?
A
Increasing the permeability of the cell membrane
B
Increasing the concentration gradient
C
Increasing the temperature
D
Decreasing the surface area of the cell membrane
Verified step by step guidance1
Understand the concept of diffusion: Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. The rate of diffusion can be influenced by several factors.
Consider the effect of permeability: Increasing the permeability of the cell membrane allows glucose molecules to pass through more easily, thus speeding up the rate of diffusion.
Analyze the concentration gradient: Increasing the concentration gradient means there is a larger difference in concentration between the inside and outside of the cell, which typically increases the rate of diffusion.
Evaluate the impact of temperature: Increasing the temperature generally increases the kinetic energy of molecules, leading to faster movement and a higher rate of diffusion.
Assess the role of surface area: Decreasing the surface area of the cell membrane reduces the area available for glucose to diffuse through, which would slow down the rate of diffusion rather than speed it up.
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