How can we help?

You can also find more resources in our Help Center.

26 terms

Cell Processes

STUDY
PLAY
Osmosis
Diffusion of water across a semipermeable membrane
Diffusion
Movement of particles from a higher concentration to a lower concentration
Hypertonic
Concentration of solutes OUTSIDE of a cell is HIGHER than the concentration of solutes inside (cell shrinks)
Hypotonic
Concentration of solutes INSIDE the cell is HIGHER than the concentration of solutes outside. (cell explodes)
Isotonic
The concentration of solutes inside and outside of the cell is the SAME. (equilibrium / stable)
Passive transport
HIGH to LOW concentration, with the concentration gradient, no ATP (energy) needed
Active transport
LOW to HIGH concentration, against the concentration gradient, requires ATP (energy)
Hydrophilic
Water loving, like the phosphate head in a phospholipid
Hydrophobic
Water fearing, like the lipid tail in a phospholipid
Exocytosis
Movement of materials out of the cell - exit (active transport)
Endocytosis
Movement of material into the cell - enter (active transport)
ATP
Adenosine Triphosphate, 1adenine and 3 phosphates
ADP
Adenosine Diphosphate, formed when ATP loses an end phosphate group
Functions of ATP
Energy for movement of muscle cells, energy for movement of cilia and flagella, active transport, and the breakdown of large molecules
Semipermeable membrane
Allows only certain molecules to pass through it
Facilitated diffusion
The use of carrier proteins for diffusion or protein channels (coin machine)
Transport
The process where molecules, food, and other substances are moved across the membrane
Cell membrane
Double layer of proteins (phospholipids) that controls what goes in and out of cell; selectively permeable
Intracellular
Inside cell
Extracellular
Outside cell
Homeostasis
Stable internal enviornment
concentration gradient
difference in concentration of a substance on two sides of a membrane
solute
substance being dissolved
vesicle
A membrane bound sac that contains materials involved in transport of the cell.
phagocytosis
cell eating solid particles
pinocytosis
cell drinking particles dissolved in water