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22 Cards in this Set
- Front
- Back
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2 solutions:
123 atm 111 atm which has more solute, which has more water |
123-more solute, less water
111- less solute, more water |
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The more __________ you have, the more osmotic pressure you have
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solute
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If a solution causes a cell to shrink it is
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hypertonic
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If the solution causes NO CHANGE to cell volume it is
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isotonic
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if a solution causes a cell to swell it is
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hypotonic
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Human plasma has an osmotic pressure of
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290-300 mOsm
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Isosmotic means
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solute same on inside as outside of cell
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hyposmotic means
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less solute on outside than inside
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hyperosmotic means
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more solute on outside that inside
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Osmicity can be calucuated immendiately but what must be known to calculate tonicity
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cell permeability
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explain why mannitol is a good way to pull water off of brain
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because it is a large carbyhydrate and there is none in the body so water will readily flow out to the CV systme where the mannitol is
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explain how to calculate mOsm in body and stuff
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Simply multiply the ic part of the equation i=particles the solution breaks into, c=osmotic coefficient
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What is the extracellular concentration of sodium extracellular? intracellular
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ECF Na=142
ICF Na= 10 |
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Human cell membranes are NOT semi-permeable they are ____________ permeable
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differentially
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What is the extracellular concentration of K? intracellular?
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ECF K=4
ICF K=140 |
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What are the three major components of the cell?
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Plasma membrane
Cytosol Nucleus |
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What is the plasma membrane composed of
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lipid bilayer
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What are microvilli
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small hair like protrusions that increase surface area for absorption and transport
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What is the function of the plasma membrane?
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transport, enzymatic function-receptor sites
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What is a tight junction?
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the barrier that exists between cells
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What are desmosomes?
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An anchoring junction, keep cells close together so electrical signals can be passed from one to another
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what is a gap junction?
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gap in cells for electrical impulse to a pass from cell to cell in.
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