The most abundant anion in plasma membranes is:
phosphate
potassium
calcium
chloride
The Correct Answer is D
A. Phosphate: Phosphate is mainly found intracellularly.
B. Potassium: Potassium is a cation, not an anion.
C. Calcium: Calcium is a cation.
D. Chloride: Chloride is the most abundant extracellular anion and important in fluid balance.
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Related Questions
Correct Answer is B
Explanation
A. hypochloremia: Chloride loss may occur, but it's less critical than potassium loss.
B. hypokalemia: Diuretics, especially loop diuretics like furosemide, cause potassium loss, leading to hypokalemia.
C. hyponatremia: Thiazide diuretics may cause this, but hypokalemia is more common and dangerous.
D. hypoglycemia: Diuretics do not typically cause hypoglycemia.
Correct Answer is A
Explanation
A. Plasma: Interstitial fluid is the fluid that surrounds and bathes the cells in tissues, facilitating nutrient exchange and waste removal. It is essentially derived from plasma, the liquid component of blood, but lacks the high concentration of proteins found in plasma.
B. Blood: Blood is composed of plasma and cells; it’s not considered interstitial fluid.
C. Packed red cells: These are blood cells separated from plasma and not part of interstitial fluid.
D. Bile: Bile is produced by the liver to aid digestion, not part of the interstitial fluid.
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