Nice job! As you can see an aquaporin has now appeared in the cell membrane. Which types of molecules are transported by aquaporins? a) Charged molecules b) Bulky molecules c) All of these molecules d) Water
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An aquaporin is a. a channel protein that allows the influx of $\mathrm{K}^{+}$ into cells, causing water to also flow in between the phospholipids of the plasma membrane. b. a type of blue-colored pore in the epidermal surfaces of plants. c. a protein channel in plasma membranes that facilitates the diffusion of water. d. a transport protein, or transporter, in plasma membranes that uses protons to cotransport water. e. none of the above.
An aquaporin is a. a channel protein that allows the influx of K+ into cells, causing water to also flow in between the phospholipids of the plasma membrane. b. a type of blue-colored pore in the epidermal surfaces of plants. c. a protein channel in plasma membranes that facilitates the diffusion of water. d. a transport protein, or transporter, in plasma membranes that uses protons to cotransport water. e. none of the above.
Some cells express aquaporin proteins—they are channel proteins that facilitate the flow of water molecules through the plasma membrane. What regulates the rate and direction of water diffusion across the membrane? Select one: a. solute concentrations on either side of the membrane b. resting membrane potential c. availability of ATP d. aquaporin pore size
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