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Anatomy Unit 3 Vocab
Unit 3 Vocabulary--Cantley
| Term | Definition |
|---|---|
| Cell Membrane | The selectively permeable outer boundary of a cell consisting of a phospholipid bilayer embedded with proteins. |
| Nucleus | Cellular organelle enclosed by double layer porous membrane and containing DNA. |
| Organelles | A structure in a cell that has specialized functions. |
| Selective Permeability | Membrane that allows some types of molecules through but not others: Semipermeable. |
| Cytoskeleton | A cells framework of protein filaments and tubules. |
| Endoplasmic Reticulum | Organelle composed of a network of connected membranous tubules and vesicles. |
| Ribosome | Organelle composed of RNA and protein that is structural support for protein synthesis. |
| Golgi Apparatus | Organelle that prepares and modifies cellular products for secretion. |
| Mitochondria | Organelle housing enzymes that catalyze the aerobic reactions of cellular respiration. |
| Cilia | Microscopic hair like processes on the exposed surface of certain epithelial cells. |
| Flagella | Relatively long, motile process that extends from the surface of a sperm cell. |
| Vesicles | Membranous cytoplasmic sac formed by an infolding of the cell membrane or pinching off of membranes within the cell. |
| Nucleolus | Small structure in the cells nucleus that contains RNA and proteins. |
| Diffusion | Random movement of molecules from a region of higher concentration to a region of lower concentration. |
| Osmosis | Movement of water through a semipermeable membrane toward a concentration of an impermeant solute. |
| Isotonic | Solution with the same osmotic pressure as the solution ( usually body fluids) to which it is compared. |
| Hypertonic | Solution with a greater osmotic pressure that the solution (usually a body fluid) to which it is compared. |
| Hypotonic | Solution with a lower osmotic pressure than the solution ( usually a body fluid) to which it is compared. |
| Active Transport | Process that requires energy and a carrier molecule to move a substance across a cell membrane against the concentration. gradient. |
| Passive Transport | Processes that do not require energy to move a substance across a cell membrane. |
| Endocytosis | Process by which a cells membrane envelops a substance and draws it into the cell in a vesicle. |
| Exocytosis | Transport of a substance out of a cell in membrane bound vesicle. |
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