Which of the following occur without coupling transport of the solute to the movement of a second solute?

(a) import of glucose into gut epithelial cells
(b) export of Ca2+ from the cytosol
(c) export of H+ from animal cells for pH regulation
(d) the export of Na+from cells to maintain resting membrane potential

Ion Channels and the Membrane Potential


(b) Ca2+ is exported using ATP-powered pumps. There are no other solutes that are being moved by these pumps.

Biology & Microbiology

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