D2.3 water potential

Hypertonic

High concentration

Hypotonic

Low concentration

Isotonic

Equal concentration

Solvation

interactions of a solvent forming hydrogen bonds with the molecules or ions of a solute to form a solution

Lysed

When an animal cell bursts

Turgid

Plant cell is filled with water

Flaccid

Plant cell has little water in

Plasmolysed

Plant cell membrane has come away from cell wall due to lack of water in the cell

Crenated

Animal cell that has shrivelled due to lack of water

Why do plant cells ideally need to be turgid

To provide support for the plant

What is an example of isotonic fluids being used in a medical environment

When transporting organ to keep the cells from lysis or crenation

Water potential

Potential energy per unit volume (kPa)

What water potential was pure water at 20 degrees been assigned

0

Past pure water, if a solution becomes more concentrated does it gain or lose water potential - is he water potential negative or positive

Negative

How does hydrostatic pressure effect water potential

Higher pressure = more potential energy

Water potential equation

Solute potential + pressure potential

Solute potential

Potential energy when a solute is dissolved in water

Would adding salt to water increase or decrease SOLUTE potential

Decreases it - making solute potential negative

If you remove salt to water does the solute potential increases or decrease

Increase

When may negative pressure occur

In xylem vessels where sap is transported under tension