B1.9 - Active Transport Flashcards
1
Q
Active transport
A
- moves substances needed by cell
- against a concentration gradient
2
Q
Why is active transport useful
A
-allows nutrients to be collected from areas of low concentration (soil) and transported to areas of high concentration (cytoplasm)
3
Q
What does active transport allow the cell to do
A
- absorb ions from very dilute solutions
- enables cell to move substances through cell membrane
4
Q
Energy for active transport
A
- energy required to move molecules back/forth across membrane
- produced by cell respiration
- many mitochondria to release energy
5
Q
Active transport in root hair cells
A
- used to absorb minerals from the soil
- absorbs from very dilute solutions
- carries ions against the concentration gradient
6
Q
Active transport in the small intestine
A
- enables sugars used for cell respiration to be absorbed
- from a lower concentration (gut)
- into an area of higher concentration (blood)
