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11 Cards in this Set
- Front
- Back
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Two major fluid compartments
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63% Intracellular fluid compartment(fluid within cells)(water is 99% OF THIS)
37% Extracellular fluid compartment(Fluid in plasma, lymph, aqueous humor, etc) |
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Principle cations in ICF and ECF
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ICF=Sodium(principle), chlorine and bi-carbonate
ECF=Potassium(principle), magnesium , phosphate-negatively charged proteins |
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Source of water gain and water loss; what two systems responsible
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Digestive system for water gain
Urinatry system for water loss |
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Homeostatic mechanisms respond to changes in this fluid compartment.
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ECF.
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Effects of ADH, Aldosterone and natriuretic peptides
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ADH-stimulates thirst/water conservation at kidneys(concentrates urine)
Aldosterone-(water follows salt) cause kidneys to conserve salt and stimulate water retention. Naturetic Peptides-reduce thirst, Block ADH and Aldosterone, cause diuresis and lower blood volume and pressure. |
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Pressures involved in exchange between plasma and interstitial fluid
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Net hyhdrostatic pressure=water out of plasma --into interstitial fluid.
Net colloid osmotic pressure draws water out of interstitial fluid and into plasma. |
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Water accounts for what percentage body weight in males and females
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Males are 60% water
Females are 50% water |
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Homeostatic responses to severe water loss
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Increase in ECf osmostic pressure, osmoreceptors detect increase in thirst, ADH & Renin secretion, decrease in urine output, drink water
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Homeostatic responses to severe water gain
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Decrease in ECF osmotic pressure, decrease in ADH release, urine output increases
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Types of acids in the body
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1. Volatile-carbonic-(can leave the solution & enter atmosphere)
2. Fixed-Sulfuric and Phosphoric acid- 3. Organic-are aerobic or anaerobic, (anaerobic-lactic acid) |
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Major buffer systems which ones are there
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Protein Buffer systems-plasma proteins and proteins within the cell-regulates ph within ICF and ECF-works with other buffers.
Carbonic-bicarbonate system-most important in ECF, most cells constantly generate co2, most co2 is converted to carbonic acid Phosphate buffer system-buffers ph of ICF and urine,is a weak acid |
