Osmosis and diffusion

investigate the way in which materials can move into and out of cells, including but not limited to: • conducting a practical investigation modelling diffusion and osmosis (ACSBL046) • examining the roles of active transport, endocytosis and exocytosis (ACSBL046) • relating the exchange of materials across membranes to the surface-area-to-volume ratio, concentration gradients and characteristics of the materials being exchanged (ACSBL047)

isotonic

Isotonic = the amount of water going into the cell is the same amount going out of the cell  is at an equal rate

osmosis

Osmosis is the movement of water from high to low concentration 

• It is passive doesn't need energy

• Movement must travel across a semipermeable membrane 

• Water is the only thing that movies in osmosis 

• Semipermeable is selective

diffusion

 Diffusion: Is the dispersion of molecules into an available space. High to low concentration 

Passive diffusion= cell movement  into other cells without energy 

simple diffusion

The passive net

movement of a

substance from a

region with a high

concentration to a

region with a low

concentration.

facilitated diffusion

facilitated/active transport = cells changed shape in order to fit into the heads via channel or carrier proteins, channel means changing shape to pass through something.

carrier protien

Carrier protein hooks on to the cell and forces the cell to change shape and fit through the bilayer.

hypertonic

Hypertonic=  water keeps moving out of the cell and shrinks or flaccid in plants 

Hypotonic

Hypotonic = water keeps moving into the cell and cant allow water to get out  keeps moving in.

passive diffusion

cell movement  into other cells without energy 

facilitated/active transport

Facilitated/active transport = cells changed shape in order to fit into the heads via channel or carrier proteins, channel means changing shape to pass through something.