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Anatomy:Chapter3
Term | Definition |
---|---|
Interstitial fluid | Dilute saltwater solution; derives from blood |
Nucleoli | In the nucleus; sites where ribosomes are assembled. |
Chromatin | Loose network of bumpy threads scattered throughout nucleus.When a cell is dividing to form 3 daughter cells, the chromatin threads coil and condense to form rodlike bodies called chromosomes |
Chromosomes | Dense, rodlike bodies of chromatin |
Plasma Membrane | Flexible, transparent barrier that contains the cell contents and separates them from the surrounding environment. "Baggie" |
Microvilli | tiny fingerlike projections that greatly increase the cell's surface area for absorption so that the process occurs more quickly. |
Tight Junctions | Impermeable junctions that bind cells together into leakproof sheets that prevent substances from passing through the extracellular space between cells. |
Desmosomes | Anchoring junctions that prevent cells subjected to mechanical stress from being pulled apart; button-like thickenings of adjacent plasma membranes, connected by fine protein filaments. |
Gap Junctions | Allows communication |
Connexons | Hollow protein cylinders that span the entire width of the abutting membranes |