Active transport (AQA GCSE Biology Combined Science): Flashcards
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What is active transport?
What is active transport?
Movement of substances across membranes using energy from respiration
Does active transport require energy?
Does active transport require energy?
Yes - needs energy from respiration
Direction of active transport movement
Direction of active transport movement
Low to high concentration (against the gradient)
What are transport proteins?
What are transport proteins?
Proteins in membranes that act as pumps, using energy to move substances
Active transport in gut - substance moved
Active transport in gut - substance moved
Glucose from intestine to blood
Active transport in plant roots - substance
Active transport in plant roots - substance
Mineral ions like nitrate () from soil water
Direction of diffusion vs active transport
Direction of diffusion vs active transport
Diffusion: high to low; Active transport: low to high
Which transport process requires energy?
Which transport process requires energy?
Active transport (diffusion and osmosis do not)
Why do plants need nitrate ions?
Why do plants need nitrate ions?
To grow properly and make proteins
How do transport proteins work?
How do transport proteins work?
Change shape using energy to push substances against gradient