Movement of Na+ across axon membrane via Na+-K+ pump is an example of:
Correct answer: A. Active transport
- A. Active transport
- B. Diffusion
- C. Passive transport
- D. Osmosis
Explanation
The Na+-K+ pump is an integral membrane protein that actively transports Na+ out of the cell and K+ into the cell, against their concentration gradients. In the case of the Na+-K+ pump, it uses the energy from ATP hydrolysis to pump three Na+ ions out of the cell for every two K+ ions it pumps into the cell.so this is an example of active transport in which forthe movement of ions or molecules across a cell membrane against their concentration gradient
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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