Multiple Choice
Which of the following statements is true about facilitated diffusion?
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6. The Membrane
Simple and Facilitated Diffusion
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Which of the following would increase the rate of facilitated diffusion?
A
Decreasing the number of transport proteins
B
Increasing the concentration gradient of the solute
C
Increasing the size of the solute molecules
D
Decreasing the temperature
Verified step by step guidance1
Facilitated diffusion is a type of passive transport that relies on transport proteins to move molecules across the cell membrane without the use of energy.
The rate of facilitated diffusion is influenced by several factors, including the concentration gradient of the solute, the number of transport proteins available, the size of the solute molecules, and the temperature.
Increasing the concentration gradient of the solute means there is a greater difference in solute concentration between the inside and outside of the cell, which can increase the rate of diffusion as molecules move to balance the concentrations.
Decreasing the number of transport proteins would reduce the rate of facilitated diffusion because fewer proteins are available to assist in moving molecules across the membrane.
Increasing the size of the solute molecules or decreasing the temperature would generally decrease the rate of facilitated diffusion, as larger molecules may move more slowly and lower temperatures can reduce the kinetic energy of molecules, slowing their movement.
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