Osmosis, Diffusion and active transport Flashcards
1
Q
Define osmosis
A
Movement of water molecules across a partially permeable membrane from a dilute solution to a more concentrated solution
2
Q
State 3 factors that affect rate of diffusion
A
Temperature, concentration and surface area
3
Q
Name an example of osmosis occurring
A
A plant absorbing water from the soil
4
Q
How do you cal percentage change from y to x
A
x-y/x X100
5
Q
How are sugar molecules used inside cells
A
For energy/respiration
6
Q
Where does active transport get its energy from
A
Respiration
7
Q
Why do plants need mineral ions
A
Growth
8
Q
Why can’t plant rely on just diffusion to absorb mineral ions from the soil
A
Conc is higher inside the plant then the soil making diffusion less effective
