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HELP1234 HELP1234
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9 years ago
Which of the following molecular movements is due to diffusion or osmosis?

A. The sodium-potassium pump pumps three sodium ions out of a neuron for every two potassium ions it pumps in.

B. Cells of the pancreas secrete insulin into the bloodstream.

C.When a plant cell is placed in concentrated salt water, water moves out of the cell.
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wrote...
9 years ago
A, pumps are active transport of course.
C is a typical osmosis example.
B is passive transport - diffusion.
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