Warm up #5 Identify 3 differences between plant and animal cells Describe 2 characteristics about the cell membrane Why is the cell membrane referred to as selectively permeable?

Warm up #6 Which type of transport is with the diffusion of water? Identify which type of transport uses a protein pump and requires ATP? Differentiate between diffusion and active transport (go for at least 2 differences)

transportation

Nature always seeks balance

Diffusion Solutes-red dots, water/outside area is solvent Concentration-mass per volume (m/v) of solute in a solvent

Diffusion

Equilibrium

Equilibrium

Osmosis The diffusion of water through a selectively permeable membrane

Isotonic-when the concentration of water is equal to the concentration of solute

Hypertonic-solution has higher solute concentration than the cell Hypotonic-solution has lower solute concentration than the cell

http://www.youtube.com/watch?v=SSS3EtKAzYc

Facilitated Diffusion Cell membrane proteins help or ‘facilitate’ the diffusion of molecules across membrane -these molecules are too big or do not have the right charge to diffuse through membrane so they must go through protein channels

Active Transport Requires energy, goes AGAINST concentration gradient -carried out by carrier proteins or Pumps

Endocytosis Endo-means ‘in’ The process of taking materials into the cell by foldings at cell membrane

Phagocytosis Extension of cytoplasm surrounds a particle & packages it within a food vacuole

Pinocytosis Cells also take up liquid. Tiny pockets form along cell membrane, filled w/ liquid, then pinch off to form vacuoles inside cell

Exocytosis Exo-to exit When cells release large amounts of material from the cell Vacuole fuses with cell membrane, forces content out of the cell

7-4: Diversity of Cellular Life

Cell Specialization Process by which cells develop (differentiate) to perform specific tasks