Literally "cell-eating." A process of bringing relatively large materials into a cell by means of wrapping extensions of the plasma membrane (pseudopodia) around the materials and fusing the extensions together.
A form of endocytosis that is dependent on receptors, whose role is to bind to specific molecules and then hold onto them.
Literally "cell drinking." A form of endocytosis that brings into the cell as small volume of extracellular fluid and the materials suspended in it.
The net movement of water across a semipermeable membrane from an area of a higher concentration to lower.
First Law of Thermodynamics
States that energy cannot be destroyed, only transformed.
Second Law of Thermodynamics
States that energy trasnfer always results in a greater amount of disoder in the universe.
Reactions in which the products contain more energy than the reactants.
Reactions in which the products contain less energy than the reactants.
A chemical reaction in which an exergonic reaction powers an endergonic reaction.
Substance that is being worked on by an enzyme.
The portion of an enzyme that binds with and transforms a substrate
Molecules other than amino acids that facilitate the work of enzymes by binding with them. Vitamins are an example of these.
A set of enzymatically controlled steps that result in the completion of a product or process in an organism.
A fluid that has a higher concentration of solutes than another causing water to flow out of a cell
Water flows into cell; ideal environment for plant cells.
Two solutions that have equal concentations of solutes.
The regulation of an enzyme's activity by means of a molecule binding to a site on the enzyme other than its active site.