Cell Membrane

Hypertonic

Having more solute molecules than cytoplasm of a cell

Hydrophobic

Water-fearing

Turgor pressure

Outward pressure on cells

Concentration gradient

A difference in amount of molecules between two areas

Selectively permeable

Allows certain molecules to pass through; keeps some molecules out

Solvent

Fluid that dissolves a solid, liquid, or gas

Isotonic

Equal amounts of solute molecules

Hypotonic

Having less solute molecules than cytoplasm of a cell

Diffusion

High to low movement of monomers; used transport protein; no energy required

Facilitated diffusion

High to low movement of small, fat-soluble, uncharged polar molecules; through phospholipid bilayer; no energy required

Osmosis

High to low movement of water; through phospholipid bilayer; no energy required

Solution

Mixture of a substance that is dissolved in another

Passive transport

Movement of molecules from high to low; no energy required

Active transport

Movement of molecules from low to high; uses transport protein; requires energy

Cholesterol

Structure that allows cells to communicate with each other to work as a unit

Phospholipid bilayer

Structure that consists of 2 layers of lipids

Transport protein

Structure that helps move molecules across the cell membrane

Carb chain

Structure that identifies the cell

Solute

Substance that is dissolved

Concentration

The amount of molecules in a specified area

Endocytosis

Use of vesicles to move polymers into the cell

Exocytosis

Use of vesicles to move polymers out of the cell

Hydrophilic

Water-loving