Bio Cell Membrane

Cell membrane (plasma membrane)

Cell membrane (plasma membrane)

phospholipid bilayer that surrounds all cells and regulates what enters and leaves the cell

Vesicle

A membrane bound sac that contains materials involved in transport of the cell.

Homeostasis

process by which organisms maintain a relatively stable internal environment

Diffusion

Movement of molecules from an area of higher concentration to an area of lower concentration; passive transport

osmosis

Diffusion of WATER through a selectively permeable membrane; passive transport

facilitated diffusion

Movement of specific molecules from high to low concentration across cell membranes through protein channels; passive

active transport

the movement of materials through a cell membrane using energy; movement from low to high concentration

concentration gradient

difference in the concentration of a substance from one location to another

passive transport

Requires NO energy Movement of molecules from high to low concentration,Moves with the concentration gradient

semipermeable (selectively permeable) membrane

allows the passage of some particles while blocking the passage of others

Endocytosis

process by which a cell takes material into the cell by infolding of the cell membrane

Phagocytosis

A type of endocytosis in which a cell engulfs large particles or whole cells; cellular eating

Pinocytosis

A type of endocytosis in which the cell ingests extracellular fluid and its dissolved solutes; cellular drinkning

Exocytosis

Process by which a cell releases large amounts of material

Isotonic

when the concentration of two solutions is the same

Hypotonic

when comparing two solutions,the solution with the lesser concentration of solutes; OR the solution with more water

Hypertonic

when comparing two solutions,the solution with the greater concentration of solutes; OR the solution with less water

Solute

Substance being dissolved

Solvent

A liquid substance capable of dissolving other substances

Solution

A mixture that forms when one substance dissolves another.

Hydrophilic

Attracted to water

Hydrophobic

Having an aversion to water; tending to coalesce and form droplets in water.