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Chapter Test 3.1
Cell Structure and Their Function Terms
| Term | Answer |
|---|---|
| What are the 6 functions of a cell? | 1. Basic unit of life. 2. Protection and support. 3. Movement. 4. Communication. 5. cell metabolism and energy release. 6. Inheritance. |
| Organelles | Specialized part of a cell performing one or more specific functions. |
| Cell Membrane/ Plasma Membrane | Outermost membrane of the cell, surrounding and binding the rest of the cell contents. |
| Extracellular substance | Refers to substances outside of the cell. |
| Intracellular substance | Refers to substances inside of the cell. |
| Mosaic Model | Moving membrane. |
| Nucleus | Cell organelle containing most of the genetic material of the cell, center of an atom consisting of protons and neutrons; collection of neuron cell bodies in the central nervous system. |
| Nucleolus | Rough, dense, well defined nuclear bodies with no surrounding membrane, subunits of ribosomes are manufactured within the nucleous. |
| Rough Endoplasmic Reticulum (Rough ER) | A series of membranes that extends from the outer nuclear membrane into the cytoplasm with ribosomes attached to it. |
| Smooth Endoplasmic Reticulum (Smooth ER) | A series of membranes that extends from the outer nuclear membrane into the cytoplasm without ribosomes attached to it. |
| Glogi Apparatus | Consists of closely packed stacks of curved, membrane-bound sacs. |
| Lysosomes | Membrane-bound vesicles formed from the Glogi apparatus. |
| Mitochondrion | ATP production site within the cell |
| Microtubules | Tube composed of tubulin microtubules help provide support to the cytoplasm of the cell and are components of certain cell organelles such as cilia and flagella |
| Cilia | tiny hairs that help move the cell |
| Flagella | found on sperm. for movement |
| Microvilli | each of a large number of minute projections from the surface of some cells. |
| Ribosomes | a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. |
| Cytoskeleton | keeps the cell in a shape and determines what can pass through |
| What are the four ways molecules can pass through the cell membrane? | right through. through diffusion. bubbles |
| Solution | a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent). |
| Solutes | the minor component in a solution, dissolved in the solvent. |
| Solvent | the liquid in which a solute is dissolved to form a solution. |
| Diffusion | the intermingling of substances by the natural movement of their particles |
| Concentration gradient | the measure of the concentration |
| Osmosis | a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane. |
| Osmotic Pressure | the pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis, often used to express the concentration of the solution. |
| Hypotonic | swell more water out of the cell |
| Isotonic | equal |
| Hypertonic | shrink... more water in the cell |
| Facilitated Diffusion | helped diffusion |
| Active Transport | the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy. |
| Sodium Potassium Exchange Pump | the part of the membrane that chooses what is taken out |
| Endocytosis | the taking in of matter by a living cell by invagination of its membrane to form a vacuole. |
| Exocytosis | a process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane with the cell membrane. |
| Glycolysis | the breakdown of glucose by enzymes, releasing energy and pyruvic acid. |
| Aerobic Respiration | relating to or denoting exercise that improves or is intended to improve the efficiency of the body's cardiovascular system in absorbing and transporting oxygen. |
| Anaerobic Respiration | relating to or denoting exercise that does not improve or is not intended to improve the efficiency of the body's cardiovascular system in absorbing and transporting oxygen. |