Question

Which example is one specific form of simple diffusion?
1. If water moves into a cell by osmosis, it is moving into an area of higher water concentration.
2. If water moves into a cell by osmosis, it is moving into an area of higher solute concentration. 3. If water moves into a cell by diffusion, it is moving into an area of higher solute concentration. 4. If water moves into a cell by diffusion, it is moving from an area of higher concentration to an area of lower concentration.

Answer 1

Answer:

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Answer 2

Answer:

If water moves into a cell by diffusion, it is moving from an area of higher concentration to an area of lower concentration.

Explanation:

• By simple diffusion, small uncharged or lipid-soluble molecules enter and exit cells through phospholipids, moving from areas of high concentration to areas of low concentration (down the concentration gradient).
• Energy is not required.
• Examples

1. Smell of perfume and incense.
2. When you open a soda/cold drink bottle, the CO2 diffuses into the air.
3. Soak the tea bag in hot water and the tea will diffuse in the water.
4. Small dust particles and smoke are dispersed in the air and cause air pollution.
5. In the case of the lungs, when a person inhales room air (aka oxygen), the lungs have more carbon dioxide and less oxygen.

• Therefore, in simple diffusion, oxygen enters the lungs through cell membranes and carbon dioxide exits in the same way.

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