10 Questions
Which type of molecules can cross cell membranes through passive diffusion?
Lipid-soluble molecules
What is the role of aquaporins in membrane transport?
They form aqueous pores in the lipid bilayer
What is required for aqueous diffusion to occur through a channel?
A concentration gradient
Which type of molecules cannot cross the lipid bilayer through aqueous diffusion?
Charged molecules
What is the role of specialized carrier proteins in facilitated diffusion?
They change conformation and release solute on the other side of the membrane
Which of the following is a way in which small molecules can cross cell membranes?
Aqueous diffusion through aqueous pores formed by aquaporins
Which type of molecules can cross cell membranes through passive diffusion?
Lipid-soluble molecules
What is the role of hydration shell in membrane transport?
To prevent passive diffusion
Which of the following is required for facilitated diffusion to occur?
Concentration gradient
What is the role of aquaporins in membrane transport?
To facilitate passive diffusion
Test your knowledge on membrane transport and the distribution of total body water and ions across the body. Explore topics such as interstitial fluid, passive diffusion, and the ways in which small molecules cross cell membranes.
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