biology B3

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what is diffusion?
a process by which substances move through the cell membrane in and out of cells
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how does diffusion work?
is the net movement of a particles from a region of high to a low concentration.
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the rate of diffusion is increased by?
- a shorter distance - a greater concentration -a greater surface area
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explain diffusion in the lungs?
oxygen and carbon dioxide exchange in the alveoli in the lungs , then the oxygen enters the blood in the lungs and leaves the blood in body tissue. after that teh carbon dioxide enters the blood in body tissue and leaves the blood in the lungs. ,
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diffusion in the small intestine?
small disgested food molecules are absorbed into the blood in the small intestine by diffusion. then the food enters the blood in the small intestine and leaves the body tissue. everything pass in large intestine the glucose gets absorbed in blood
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what are the adaptations of the small intestine to absorbed food?
long , large surface area , permeable surface . good blood supply
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Card 2

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how does diffusion work?

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is the net movement of a particles from a region of high to a low concentration.

Card 3

Front

the rate of diffusion is increased by?

Back

Preview of the front of card 3

Card 4

Front

explain diffusion in the lungs?

Back

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Card 5

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diffusion in the small intestine?

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