Term
| Functions of Cell Membrane |
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Definition
- Isolate Cell.
- Regulate exchange of essential substances between cytoplasm+external environment.
- Communicate w/ other cells
- Identify cell as unique, belonging to particular species and a particular cell membrane
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Definition
| Developed in 1972 to explain structure of cell membranes |
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Cell surface markers
F= identify cell type |
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Definition
| Recognize+ bind to substances outside cell |
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Definition
| Helps substance move across cell membrane |
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Definition
| Assists chem. reaction in cell |
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Definition
| loosely attatched to surface of membrane |
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Definition
| proteins penetrate hydrophobic core |
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Definition
| process of random movement towards a state of equilibrium |
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Definition
| amount of solute relative to amount of solvent |
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Definition
| difference in concentration of a substance across a space |
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Definition
| condition in which concentration of substance is equal throughout |
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Definition
| movement of a molecule across the cell membrane from area of [high] to area of [low] |
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Definition
| random movement of molecules through lipid bilayer of membrane |
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Definition
| special kind of diffusion involving movement of H2O through membrane |
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Definition
| adjective describing a solution w higher solute concentration than another solution [solute^] |
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Definition
| adjective describing a solution that has a lower solute concentration than another solution [solute=V] |
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Definition
| Adjective describing solution with equal solute concentration as another solution |
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Term
| Facilitated diffusion by channel proteins |
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Definition
| proteins assist in moving molecules across membrane down concentration gradient |
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Term
| Facilitated diffusion by carrier protein |
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Definition
| like channel proteins, shield molecules from the interior of the membrane; bind to molecule |
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Definition
| transport of material across cell membrane up the concentration gradient, requires energy |
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Definition
| a carrier protein that used ATP to actively transport Na+ out of a cell and K+ into the cell, against concentration gradient |
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Definition
| moving large quantities of materials into cell and out of cell, requires energy but not well understood |
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| process by which material is brought into the cell by invagination of the plasma membrane and formation of a vesicle |
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Definition
| process by which material is moved out of the cell |
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| cell eating; type of endocytosis in which large particles are taken in by cell |
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Definition
| cell drinking; type of endocytosis in which liquids or small particles are taken in by cell |
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Term
| receptor mediated endocytosis |
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Definition
| type of pinocytosis that is very specific and very efficient |
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Definition
| strong cell to cell junction that attaches adjacent cells to one another |
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Definition
| leak prooof junction that creates a tight seal between cells |
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| form channels between adjacent cells and allow communication between cells w/ exchange of materials |
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Term
| First law of thermodynamics |
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Definition
| energy cannot be created or destroyed but it can change from one form to another |
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Term
| Second law of thermodynamics |
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Definition
| energy cannot be changed from one form to another without loss of visible energy |
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Term
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Definition
| relative amount of disorganization |
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