Blood Plasma · Histology

Which statement regarding plasma electrolytes is correct?

  1. They contribute significantly to the total osmotic pressure of the blood
  2. They are found in much higher concentrations in the serum than in the plasma
  3. Sodium is the primary intracellular cation
  4. They are only present during periods of dehydration
Show answer and explanation

Correct answer: They contribute significantly to the total osmotic pressure of the blood

Inorganic ions (electrolytes) like sodium, chloride, and bicarbonate are essential for osmotic balance and buffering the blood pH. Sodium is the major extracellular cation in the plasma.

Difficulty: Medium Question 8 of 20

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