Plant root hair cells need to import potassium. The concentration of potassium is higher in the cell than outside fo the cell. The proton concentration is higher outside than inside the cell. The cells use the proton gradient to move the potassium into the cell. What is this called?
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PROTON PUMPS MAKE ION UPTAKE POSSIBLE (a) Proton pumps establish an electrochemical gradient. (b) Cations enter root hairs via channels. (c) Anions enter root hairs via cotransporters. Cations enter root hairs due to the electrochemical gradient across the membrane. Anions enter root hairs through cotransporters.
Sri K.
Some animals can produce a potassium ion concentration inside their cells that is twenty times greater than that of their environment. This ion concentration gradient is maintained by the plasma membrane. Identify the process in the cell membrane that produces this difference in concentration.
Which statement about proton pumping across the plasma membrane of plants is not true? a. It requires ATP. b. The region inside the membrane becomes positively charged with respect to the region outside. c. It enhances the movement of $\mathrm{K}^{+}$ ions into the cell. d. It moves protons out of the cell against a proton concentration gradient. e. It can drive the secondary active transport of negatively charged ions.
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