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25 Cards in this Set
- Front
- Back
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What state is a living cell found in?
-What characterizes this state? |
Steady state
-Fixed parameters -Energy transfer present -Mass transfer present |
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What state is a dead cell found in?
-What characterizes this state? |
Thermodynamic equilibrium state
-Fixed parameters -No energy transfer present -No mass transfer present |
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Thermal motion?
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Atoms in liquids and gases that move by energy absorbed from the heat of their surroundings.
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Flux (J)?
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The amount of substance that passes perpendicularly through a unit of surface per time unit.
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Hyperosmotic solutions?
What happens to a cell placed in hyperosmotic solution? |
Contains a high conc. of solute relative to another solution.
Water diffuses out, shrinking the cell. |
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Hypoosmotic solutions?
What happens to a cell placed in hypeoosmotic solution? |
Contains a low conc. of solute relative to another solution.
Water moves into the cell, causing it to swell. |
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What does osmotic flow depend on?
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Conc. of particles
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Osmomole?
What is the osmomole of: -0.1 mole/litre solution of glucose? -0.1 mole/litre solution of NaCl? -0.1 mole/litre solution of Ca Cl2? -0.1 mole/litre solution of Na2SO4? |
The amount of substance of one liter which in temp. 0 C that produces an osmotic pressure of 22.4 atm
-0.1 osmomole -0.2 osmomole -0.3 osmomole -0.3 osmomole |
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Filtration?
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Flow of solution (solvent and solute) in response to hydrostatic pressure differences.
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Ultrafiltration?
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The membrane passes the solvent and solute selectively.
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Turgor pressure?
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Omsotic pressure differences between the inside and outside of the cell.
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Dialysis
Define it. What type of dialysis is there? |
Diffusion of solutes across a semipermeable membrane.
Hemodialysis Peritoneal dialysis |
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Hemodialysis is very efficient at removing...?
Hemofiltration is very efficient at removing...? |
-Low molecular weight toxins
-Higher molecular weight toxins |
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Hemodiafiltration?
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Combines hemodialysis and hemofiltration
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What does resistance depend on?
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-Material properties
-Temperature |
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Conductance?
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The reciprocal of resistance
Simens=1/Ohm |
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What kind of conductors are there?
How do they react to temperature? |
Metal
-Resistance increases with temperature Electrolytes -Resistance decreases with temperature |
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Ion mobility?
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The ratio between the ion velocity in an electrical field and the electrical field intensity.
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Gram-equivalent?
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The amount of substance that corresponds to one mole divided by the valence.
also The gram-equivalent of a substance is the amount of this substance which reacts with or releases one mole of electrons. |
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For two solutions with the same normal concentration...?
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The conductance is always the same
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Normal concentration?
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The number of gram-equivalents in a certain volume.
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Capacitor?
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An isolator between two conductors which can gather charge.
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What part of the human body acts as:
-Conductors? -Capacitors? |
-Electrolytes (intra- and extra-cellular)
-Membranes |
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Reactance?
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The resistance of the capacitor
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How do the properties of a capacitor vary with frequency?
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Low frequency=high resistance
High frequency=low resistance |
