Biology - 12-22

Solutes high --> low, No ATP needed, doesn't need protein

Diffusion

Solutes high --> low, No ATP needed, needs protein

Facilitated diffusion

Solutes low --> high, No ATP needed, doesn't need protein

Osmosis

Solutes low --> high, ATP needed, protein pump

Active diffusion

Equal concentration inside & outside cell

Isotonic

Low solute concentration outside cell

Hypotonic

Low solute concentration inside cell

Hypertonic

Big objects exiting cell

Exocytosis

Big objects entering cell

Endocytosis

Doesn’t like water

Hydrophobic

Likes water

Hydrophilic

To maintain homeostasis

Primary function of plasma membrane

Controls what can go in or out of a cell through the plasma membrane

Selective permeability

Likes water

Polar

Doesn’t like water

Non-polar

In between tails

Chloesterol

Helps identify plasma membrane

ID Tag

Layer of 2 phospholipids arranged in tail-to-tail, forming plasma membrane

Phospholipid Bilayer

Creates tunnel through plasma membrane to move big objects through

Transport protein

Molecules made up of lipids + a phosphate group

Phospholipid