Term
| Role of electrical forces on ion movements |
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Definition
| The seperation of electrical charge across a plasma membrane provides the electrical force that drives the positive ions into a cell and the negative ions out of the cell. |
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Term
| Facilitated Diffusion and Active transport similarities |
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Definition
| Involve a carrier molecule |
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Term
| Facilitated diffusion and active transport differences |
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Definition
| Active transport requires energy and movement is regardless of concentration |
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Term
| Facilitated diffusion and simple difussion similarities |
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Definition
| Move materials from high to low concentration |
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Term
| Four factors that influence the rate of passive diffusion |
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Definition
| Concentration, Temperature (increased is faster), Mass (larger is slower), surface area (increased is faster), Medium (gas is faster than liquid) |
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Term
| Differences between simple diffusion and active transport |
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Definition
| Active transport requires energy, Active transport requires carrier protein, and Active transport moves regardless of concentration (can move low to high) |
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Term
| Predict if the solute will cross the membrane |
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Definition
Nonpolar molecules can diffuse across
Small polar ions can diffuse through protein channels
Large polar molecules can diffuse by carrier mediated diffusion |
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Term
| Osmotic pressure of blood plasma |
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Definition
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Term
| Solutes that contribute to blood plasma |
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Definition
| 85% of solute particles is sodium and potassium |
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Term
| Controls the rate of exocytosis |
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Definition
| Cytosolic calcium concentrations which activates proteins required for the vesicle membrane to fuse w/ plasma membrane and release vesicle contents into extracellular fluid |
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Term
| Transport processes are operative in epithelial transport? |
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Definition
| Paracellular patheway- Diffusion between adjacent cells of epithelium. Transcellular pathway- movement into and through cells by both diffusion and active transport |
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Term
| Basolateral side of epithelial membrane |
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Definition
| Adjacent to a network of blood vessels |
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Term
| Luminal side of epithelial membrane |
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Definition
| Faces a hollow or fluid filled chamber |
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Term
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Definition
| Enters one side and diffuses through cytosol and exits the other cell |
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Term
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Definition
| Diffusion between adjacent cells |
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Term
| Factors that influene movement of non polar solute across membrane |
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Definition
| increasing lipid solubility, concentration, area, mass, temperature |
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Term
| Factors that influence movement of ion across membrane |
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Definition
| electrochemical gradient/charge, solubility, concentration, area, mass, temperature |
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