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21 Cards in this Set
- Front
- Back
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Regulated Variable |
Specific variable which is being monitored |
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Set point |
Target value at which we desire to keep the regulated variable |
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Sensors |
Monitor the variable |
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Afferent pathway |
Information collected by sensors is transmitted to integrating center |
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Internal environment |
Extracellular fluid |
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Homeostasis |
Regulation of internal environment |
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Error signal |
Difference between measured value and set point |
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Intracellular fluid |
All the liquid confined in cell membranes |
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Interstitial fluid |
Fluid between the cells |
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Plasma |
Fluid in blood vessels |
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Desmosome |
Holds cells firmly together at one point |
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Gap junction |
Tube that connects two cells |
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Epithelium |
Cells lined up next to each other |
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Tight junctions |
Not tight like a Desmosome. restrict movement between cells of an epithelium and polarize. |
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Apical |
Top of epithelium created by tight junctions |
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Basal lateral |
Bottom of epithelium created by tight junctions |
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Passive movement |
1. No external source of energy 2. Always down concentration gradient |
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Facilitated diffusion |
Large, uncharged molecules |
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Facilitated diffusion |
Large, uncharged molecules |
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Rate of flux |
Permeability X surface area X concentration |
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Factors of permeability |
Lipophilicity, size of molecule, thickness of membrane |
