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Plasma Membrane
Plasma Membrane SCC BIO 100 CH-5
| Question | Answer |
|---|---|
| Movement of solutes across a membrane down their concentration gradient with the help of membrane proteins. | facilitated diffusion |
| Composed of a phospholipid bi-layer, integral & peripheral proteins. | plasma membrane |
| Functions of a membrane protein | structure,recognition, communication and transport. |
| Why don't plants explode as a result of osmosis? | They have rigid cell walls. |
| Short chains of this molecule form glycocalyx. | cholesteral |
| Keeps good things in and bad things out, cell communication. | plasma membrane |
| Component of plasma membrane made of a polar head and a non-polar tail. | Phospholipid bi-layer |
| Component of plasma membrane that maintains fluidity in the plasma membrane. | cholesteral |
| Component of plasma membrane that provide communication, transport, structure and recognition. | proteins |
| Component of plasma membrane that provides a adhesive layer. | glycocalyx |
| The PASSIVE movement of molecules or ions from a region of higher concentration to a region of lower concentration. | diffusion |
| The ACTIVE net movement (that requires energy) of water across of a semi-permeable membrane that and are of a lower solute concentration to an are of a higher solute concentration. | osmosis |
| These are plasma membrane proteins that are attached to the interior of the hydrophobic membrane. | integral proteins |
| These are plasma membrane proteins that are attached to either side of the membrane but not bound to the hydrophobic layer. | peripheral proteins |
| Component of Plasma membrane that acts as a patching substance and helps maintain fluidity. | cholesterol |
| A plasma membrane protein that binds with a signaling molecule. | receptor protein |
| Proteins that facilitate movement from one side of the plasma membrane to the other. | transport protein |
| The difference between the highest and lowest concentration of a solute within a given medium. | concentration gradient |
| Diffusion through a cell membrane that does not require a special protein channel. | simple diffusion |
| Requires an expenditure of energy. | Active transport |
| Does not require and expenditure of energy. | passive transport |
| The movement of materials OUT of the cell through fusion of a transport vehicle with the plasma membrane. | Exocytosis |
| The movement of large materials INTO the cell by and unfolding of the plasma membrane. | Endocytosis |
| A form of endocytosis that brings molecules into the cell through the plasma membrane. | Pinocytosis |
| Pinocytosis that involves receptor mediation with the protein clathrin. | Clathrin-mediated endocytosis |
| Endocytosis (larger materials) that "pinches off" into a vesicle moving within the cell. | Pinocytosis |
| Receptors hold onto their molecule cargo while they move laterally across the membrane and congregate in a depression referred to as a pit coated on the underside with clathrin. The pit eventually deepens and pinches off. | Clathrin-mediated endocytosis |
| Keeps good things in and bad things out, cell communication | plasma membrane |
| The movement of large materials into the cell by means of wrapping extensions of the plasma membrane around the materials. | phagocytosis |
| A conceptualization of the plasma membrane as a liquid, phospholipid bi-layer that has within it a mosaic of both stationary and mobile proteins. | fluid-mosaic model |
| A fluid that has a lower concentration of solutes than others. | hypotonic solution |
| A fluid that has a higher concentration of solutes than others. | hypertonic solution |
| Two solutions that have equal concentration of solutes. | isotonic solution |
| Immune cells exhibit this type of endocytosis. | Phagocytosis |
Created by:
ethill3
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