B3 - Active Transport Flashcards
1
Q
What cell in plants uses active transport?
A
Root hair cells.
2
Q
How does is a root hair cell specialised and how does this help?
A
It has a large surface area, so it can absorb water and minerals.
3
Q
Why won’t diffusion work in a root hair cell?
A
The mineral concentration is higher in the root hair than in the soil.
4
Q
When does active transport occur in humans?
A
When absorbing glucose from the gut and kidney tubules.
5
Q
Why can’t diffusion always work regarding glucose in the gut?
A
Sometimes there is a low nutrient concentration in the gut.
6
Q
What is the definition of active transport?
A
Absorbing a substance from a dilute solution against a concentration gradient using energy.
