MEMBRANES AND MOLECULAR MOVEMENT

Animal cell

Plant Cell

Lipid Molecule

Water -loving

Fat-loving

TYPES OF MEMBRANES

Impermeable= Impossible to pass Permeable= Permission to pass

Semi-permeable=Some can pass.

Membrane Proteins

Large Molecules

Membrane Proteins

Mem

bra

ne

MOLECULAR MOVEMENT

Osmosis is the movement of WATER from high to low concentration.

Diffusion is movement of solid molecules (solutes) from high to low concentration.

Flies = representing water molecules

Bird= Representing sugar molecules

Small

LARGE

Cell membrane (CAGE)

TYPES OF CONCENTRATIONS

Isotonic -Iso means (same). The cell is in a normal state. Same amount of water and solutes in and out of the cell.

Hypotonic - The cell swells because more water

goes in the cell. Less solutes outside of the cell, high concentration of solutes in the cell, so water moves in.

Hypertonic- The cell shrinks because water leaves the cell. High concentration of solids on the outside of the cell, so the cell loses water and shrinks.

water

water

waterwater

Cell SWELLS

Cell stays the SAME

Cell Shrinks

ANIMAL CELL

PLANT CELL

Isotonic Hypotonic Hypertonic

Isotonic Hypotonic Hypertonic