Cell Transport

​Cell Transport

Cell transport is movement of materials across cell membranes.

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Two Types:​

1. Passive transport

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2. Active transport

​Passive Transport

​The movement of substances across the cell membrane without using energy from the cell.

​Examples:

1. diffusion

2. facilitated diffusion

3. osmosis.

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​(does not require energy​)

​​Passive Transport

​Diffusion

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​Experiment

(Demonstrating diffusion)

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• ​Hypothesis: Particles move from an area of high concentration to an area of low concentration.

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1. Carefully place about 2ml of dye solution at the bottom of a transparent container of water by using the dropper.

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2. Observe and record what happens after 5 minutes​.

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3. What is your conclusion?

​Diffusion is the movement of particles from a area of higher concentration to an area of lower concentration.

​beginning

​after 5 mins

Examples of diffusion in everyday life:​​

1. The smell of perfumes or incense sticks.

2. Opening the soda or cold drinks bottle and the CO₂ diffuses in the air.

3. Dipping the tea bags in hot water will diffuse the tea in hot water.

4. Small dust particles or smoke diffuse into the air and cause air pollution.

5. Breathing and taking oxygen into the body and diffuses in our blood.

Examples of diffusion in everyday life:​​​

6. Transport of Biomolecules and Minerals in Plants and Animals.

7. Sugar gets dissolved evenly and sweetens the water without having to stir it.

8. Removal of Waste Substances and Toxins from our Body.

9. Gas exchange in the lungs.

10. Diffusion of waste products, salt, and water in the kidneys