Upgrade to remove ads
Only $2.99/month

Biology Unit 8: Cellular Processes for Homeostasis

Terms in this set (19)

Osmosis
Diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration
Diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration.
concentration gradient
A difference in the concentration of a substance across a distance.
Hydrophilic
water loving
Hydrophobic
Water fearing
Hypertonic
when comparing two solutions, the solution with the greater concentration of solutes
Isotonic
when the concentration of two solutions is the same
passive transport
the movement of substances across a cell membrane without the use of energy by the cell
active transport
Energy-requiring process that moves material across a cell membrane against a concentration difference
facilitated diffusion
Movement of specific molecules across cell membranes through protein channels
Endocytosis
process by which a cell takes material into the cell by infolding of the cell membrane
Exocytosis
Process by which a cell releases large amounts of material
fluid mosaic model
model that describes the arrangement and movement of the molecules that make up a cell membrane
permeable
penetrable
Semipermeable
some substances can pass directly through the cell membrane by passive or active transport
Vesicle
A membrane bound sac that contains materials involved in transport of the cell.
Vacuole
Cell organelle that stores materials such as water, salts, proteins, and carbohydrates
membrane bound
surrounded by a membrane
Enzyme
A type of protein that speeds up a chemical reaction in a living thing
OTHER SETS BY THIS CREATOR