Transport Across Membranes Flashcards
1
Q
Diffusion
A
Diffusion is the movement of fluids/dissolved liquids from an area of high concentration to an area of lower concentration .
2
Q
Osmosis?
A
- movement of water
- across a semipermeable membrane
- from high water concentration
- to lower water concentration
3
Q
Active Transport
A
- The movement of ions or molecules
- across a cell membrane
- to a region of higher concentration
- protein carriers
- REQUIRING ENERGY
4
Q
plasmolyzed cell
A
-when all the water is removed from the plant cell
5
Q
flaccid cell
A
- floppy or loose
- drawn in and pulled away from cell wall
6
Q
turgid cell
A
- swollen and hard
- pressure is so high in the cell → no water can enter
7
Q
factors that affect rate of diffusion
A
- temp - as particles have more energy
- concentration gradient - higher the faster rate of diffusion
- surface area - as more area for particles to move across
- membrane permeability
8
Q
factors that affect the rate of osmosis
A
- Pressure
- Temperature
- Surface Area
- Water Potential
- Concentration gradient
9
Q
what does active transport require
A
- energy
- specialised proteins
10
Q
Surface Area to Volume Ratio
A
The Ratio of surface area to volume
Increases the rate of absorption
11
Q
Other names for Plasmolyzed, Flaccid, Turgid
A
Hypertonic Solution, Isotonic Solution, Hypotonic Solution
