Passive Transport
what is passive transport
The movement of a substance across a membrane with the concentration gradient.
What are the different types of Facilitated Diffusion?
Channeled Proteins
Carrier Proteins
what is Active transport
Energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration.
what is Hypertonic
Having more particles outside of the cell than inside the cell
what is Simple diffusion
particles are able to move directly through the phospholipid bilayer. only applicable for very small, uncharged particles. does not utilize channel proteins
What is diffussion
The movement of molecules in a fluid or gas from an area of higher concentraton to an area of lower concentration.
What's the difference between the two types of Facilitated Diffusion?
Channeled Proteins:
No binding Site
Does not opens and closes
Carrier Proteins:
Have a binding site
Opens and Closes
what is Endocytosis
Uptake of liquids or large molecules into a cell by inward folding of the cell membrane.
what is Hypotonic
Having more particles inside the cell than outside of the cell
what is Facilitated diffusion
particles are able to cross the membrane but with help of integral proteins that span the length of the cell membrane
what is concentration gradient
Differences in concentration of a substance from one location to another.
What happens in Facilitated Diffusion
They pass through carrier or channel proteins in the membrane, and their movement is facilitated by a protein. Molecules moving DOWN their concentration gradient.
what is Concentration gradient
Difference in the concentration of a substance from one location to another.
what is Isotonic
Having the same number of particles inside the cell as outside the cell
what is Active transport
occurs when particles are pumped or forced across the membrane against their concentration gradient. This transport requires the use of ATP.
what is dynamic equilibrium
Concentration is equal but molecules are still moving.
What happens in Simple Diffusion
Small molecules are able to move through gaps between the phospholipid molecules in membranes.
what is Exocytosis
Release of substances out of a cell by the fusion of a vesicle with the membrane.
what is Osmotic Pressure
The ability of osmosis to lift a column of water
what is Osmosis
the passive transport of solvent fluid (usually water) from areas of lower solute concentrations to higher solute concentration, a non-energy consuming process; does not utilize channel proteins
what is osmosis
The movement of water across a membrane from an area of high concentration to an area of low concentration.
what is Diffusion
Movement of molecules from a higher to lower concentration until equilibrium is reached
what is Diffusion
Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration.
what is Diffusional Equilibrium
A state of uniform distribution of molecules within a cell
what are Lysosomes
vesicles produced from the Golgi that contain digestive enzymes for breaking down nutrients, cell debris, and bacteria.