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AnP Ch 3 Part B
Chapter 3 part B
Term | Definition |
---|---|
Active Transport | Moves solutes against their concentration gradient. |
Primary Active Transport | Required energy comes directly from ATP hydrolysis. |
Secondary Active Transport | Required energy is obtained indirectly from iconic gradients created by primary active transport. Energy stored in gradients is used indirectly to drive transport of other solutes. |
Vesicular Transport | Involves a large particles, macromolecules and fluids cross membrane in membranous sacs called Vesicles. |
Endocytosis | Transport into cell |
Exocytosis | Transport out of cell |
Phagocytosis | type of endocytosis that is referred to as cell eating. |
Pinocytosis | type of endocytosis that is referred to as cell drinking or fluid phase endocytosis. |
Receptor Mediated Endocytosis | involves endocytosis and transcytosis of specific molecules. |
Secretory Vesicle | Substance being ejected is enclosed in this |
Resting Membrane Potential | Electrical potential energy produced by separation of oppositely charged particles across plasma membrane in all cells. Maintained by through action of the Na+-K+ pump, which continuously ejects 3Na+ out of cell and brings 2K+ back inside. |
Cell Adhesion Molecules | every cell has thousands of sticky glycoprotein CAM's projection from membrane. |
Plasma Membrane Receptors | Membranes receptor proteins serve as binding sites for several chemical signals. |
Contact Signaling | Cells that touch recognize each other by each cells unique surface membrane receptors. |
Chemical Signaling | Interaction between receptors and ligands that cause changes in cellular activities. Activated G protein. |