Q:

The specific gravity (relative density) of______

Asmaa
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2022-07-05
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The specific gravity (relative density) of:

  1. Red cells is less than that of plasma.
  2. Plasma is due more to its protein than to its electrolyte content.
  3. Plasma decreases as extracellular fluid and electrolytes are lost.
  4. Blood is higher on average in women than in men.
  5. Urine can fall below 1.000 in a water diuresis
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Asmaa
2022-07-05
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A. False Red cells are heavier and hence sediment on standing.

B. True The mass of plasma proteins (70–80 grams/litre) far exceeds that of plasma electrolytes (about 10 grams/litre).

C. False It increases; plasma specific gravity is an index of ECF volume if protein levels are normal.

D. False It is higher in men, who have a higher haematocrit.

E. False The specific gravity of pure water is 1.000; urine is water plus solutes.

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