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Troyanec [42]
2 years ago
14

What are the three primary mechanisms by which molecules move across the cell membrane. Explain how each mechanism goes with or

against the concentration gradient and whether they each use energy.
Biology
1 answer:
SVETLANKA909090 [29]2 years ago
3 0
The three primary mechanisms by which molecules move across the cell membrane are :
- Passive transport, the movement of molecules that does not require energy
- Diffusion,  when molecule move from higher concentration to lower concentration
- Osmosis, when molecule move to higher concentration

hope this helps
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The cause for this situation particularly in older people is the changes in the vascular system or circulatory system.

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OlgaM077 [116]
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How had the aswan high dam changed the soil in egypt
marusya05 [52]

Answer: the dam cause no more fertile soil to enter in to farmers land for growing crops hope this helps :)

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