Effects of osmosis Flashcards
1
Q
HYPERTONIC MEDIUM
A
- it has a HIGH solute concetration
- LOWER water potential that the cell within it.
2
Q
HYPOTONIC MEDIUM
A
- LOW solute concentration
- HIGH water potential than the cell within it.
3
Q
ISOTONIC MEDIUM
A
- Has the SAME solute concentration and water potential as the cell within it.
4
Q
What is hydrostatic pressure and why is potentially damaging to the cells.
A
- When a solution in a closed system, such as a cell, results in an increased pressure.
- This is damaging because the membrane cannot withstand the increasing pressure.
5
Q
Explain why do red blood cells look like the way it does?
A
- They are like a biconcave disc
- This provides a high surface area to volume ratio, allowing gases to diffuse effectively in and out of them.
6
Q
What would happen to the last cell if osmosis into the cell was to continue? What is this called?
A
- The cell will continue to gain water by osmosis until the cell membrane is stretched too far and the cells bursts and the cells is not able to withstand the increased pressure.
- CYTOLYSIS
7
Q
HYPERTONIC CELL - What happens?
A
- Net movement of water out
- shriveled cell
8
Q
HYPOTONIC CELL - what happens?
A
- Net movement of water in
- cell swells, may burst
9
Q
ISOTONIC CELL - What happens?
A
- No net movement of water
- normal cell
10
Q
What is the ideal environment for an animal cell?
A
- Isotonic environment
- NOT HYPOTONIC - animals in a hypotonic solution will shrivel up and may die
11
Q
What is the ideal environment for an plant cell?
A
- Hypotonic environment
- to prevent cell from bursting
12
Q
How do plants maintain tugor?
A
- This is by directing water into specialised vacuoles
- The vacuoles are hypertonic to the cytoplasm so they draw water out of the cytoplasm
13
Q
Why is Tugor pressure important?
A
- Tugor pressure is important for the plants for roles like growth, development.
- Plant cells, the energy content of water molecules can be quickly adjusted.
