Biology B3 1.2 Active transport.

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What does active transport do?
Active transport allows cells to take in substances against a concentration gradient.
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What energy does active transport use?
Active transport uses energy from respiration.
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What substances can be absorbed by active transport?
Ions, from dilute solutions, and other substances such as sugar can be absorbed by active transport.
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How does active transport differ in terms of needs in relation to diffusion and osmosis?
Active transport needs energy whereas diffusion and osmosis do not.
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How do cells absorb substances which are in short supply (i.e. against the concentration gradient) using active transport?
Across partially permeable membranes against the concentration gradient.
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What energy does active transport require?
Energy released in respiration.
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How do root calls absorb mineral ions?
From the dilute solutions in the soil by active transport.
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How is glucose reabsorbed?
It can be reabsorbed in the kidney tubules by active transport.
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Why does active transport require energy?
The particles are being absorbed against a concentration gradient.
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Card 2

Front

What energy does active transport use?

Back

Active transport uses energy from respiration.

Card 3

Front

What substances can be absorbed by active transport?

Back

Preview of the front of card 3

Card 4

Front

How does active transport differ in terms of needs in relation to diffusion and osmosis?

Back

Preview of the front of card 4

Card 5

Front

How do cells absorb substances which are in short supply (i.e. against the concentration gradient) using active transport?

Back

Preview of the front of card 5
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