Bio pls

Diffusion

Random movement of molecules from high to low concentration

Osmosis

Diffusion but specifically for water through a semi-permeable membrane

Active Transport

Transport that requires ATP to go against the concentration gradient, to be low to high instead

Selective Permeability

Membrane that stops passage of certain molecules

Dialysis

Movement of solute across a selectively permeable membrane

Lugol’s Solution (IKI)

Tests for starch by turning from amber to dark blue in its presence

Water

Smallest molecule

IKI

Second smallest molecule

Glucose

Third largest molecule

Membrane Pores

Second largest molecule

Starch

Largest molecule

Tonicity

Concentration like hypertonic hypotonic and isotonic

Isotonic

Equal solute concentrations

Hyptertonic

Higher solute concentration (and lower water potential) compared to other solution

Hypotonic

Lower solute concentration (and higher water potential) compared to other solution

Hypo-Hyper

Osmosis direction

Water Potential

Measure of energy of water in a solution that determines flow direction (higher is closer to zero)

Tissue Osmotic Concentration

x intercept of a mass change graph is the molarity that is isotonic to the tissue

Plasmolysis

Cytoplasm shrinking and detachment of membrane from wall in hypertonic conditions

Turgor Pressure

Pressure exerted by water against cell wall in hypotonic conditions