Movement into & out of cells Flashcards
1
Q
What is the role of water
A
- used as a reagent in digestion, hydrolysis
- dissolve metabolic wastes & excrete them out of the body
- transport medium in blood & vascular tissues of plants
2
Q
What is diffusion
A
Net movement of molecules from a region of higher concentration to a region of lower concentration down a concentration gradient
3
Q
Factors affecting diffusion
A
1) SA
2) Temperature
3) Concentration gradient
4) Distance
4
Q
What is osmosis
A
Net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane
5
Q
Importance of turgidity
A
- keep stems upright
- keep leaves firm & flat so they can absorb
sunlight
6
Q
What is active transport
A
Movement of molecules from a region of lower concentration to a region of higher concentration against a concentration gradient, by using metabolic energy
