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15 Cards in this Set
- Front
- Back
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What is the hematocrit?
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% of blood volume occupied by RBCs. (45%)
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What is the relative proportion of plasma to ICF with respect to total volume of water in the body?
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Plasma is 25% the total ECF (5% of total body water).
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What are the two major compartments of the ECF?
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Plasma and ISF.
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What is the total quantity and percentage of TOTAL BODY WATER of :
1. ICF 2. ECF 3. ISF 4. Plasma 5. Buffy Layer and Transcellular Fluid |
1. 66.67%
2. 33.33% 3. 75% of ECF 4. 25% of ECF 5. Less than 1-2% each. |
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What is the transcellular fluid?
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An aggregate of small fluid volumes secreted by specific cells into a number of body cavities and having specialized functions.
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What effect does an increase of transcellular fluid have on the body?
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The effects are local, rarely systemic.
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What is the formula to determine fluid compartment volumes indirectly? Describe the procedure.
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V = Q/c
Inject an indicator of Q amount that can have its concentration measured. Wait for it to equilibrate. Remove a known volume of blood and centrifuge it to obtain plasma. Measure C in a unit volume of plasma. |
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Name some characteristics of a good indicator (4).
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Non-toxic, diffuse readily, distribute thoroughly throughout the compartments, does not affect water balance between different compartments.
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What are good indicators to measure total body water?
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Antipyrine, deuterium, T2O.
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What are good indicators to measure ECF?
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Inulin, Sucrose, Mannitol, Na2SO4
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What is a good indicator for measure plasma volume?
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Evans' Blue
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Fill in the blanks :
The ECF must not cross _____. The plasma must not cross ______. |
Cell membrane. Capillary wall.
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What ions are predominant in the ICF?
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K+ and PO4 3-.
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What ions are predominant in the ECF?
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Na+ and Cl-
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Are proteins found more in the ISF or the plasma?
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Plasma.
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