Which electrolyte has the greatest influence on water balance in the body:

chloride

potassium

sodium

calcium

Answer and Explanation

The Correct Answer is C

A. chloride: Chloride follows sodium and helps maintain osmotic pressure but is not the primary driver.

B. potassium: Potassium is the major intracellular cation and influences cell function, not extracellular water balance.

C. sodium: Sodium is the main extracellular cation and key in regulating osmotic pressure and fluid balance.

D. calcium: Calcium is important for muscle contraction and bone health but not for water balance.

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Correct Answer is B

Explanation

A. joints: Joints contain synovial fluid, not aqueous or vitreous humor.

B. eye: The aqueous humor is in the anterior chamber, and the vitreous humor fills the posterior chamber of the eye.

C. blood vessels: Blood vessels contain plasma and blood cells, not these fluids.

D. brain: The brain contains cerebrospinal fluid, not aqueous or vitreous humor.

A. none of the answers are correct B. hypotonic C. isotonic D. hypertonic

Correct Answer is D

Explanation

A. none of the answers are correct: One of the listed answers (isotonic) is

B. hypotonic: Hypotonic fluids cause water to move into cells, potentially leading to cellular swelling.

C. isotonic: Isotonic fluids (e.g., 0.9% NaCl) have the same osmolarity as plasma and expand extracellular volume without causing fluid shifts.

D. hypertonic: Hypertonic fluids draw water out of cells, causing cellular dehydration.

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Which electrolyte has the greatest influence on water balance in the body:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The vitreous and aqueous humors are found in the:

Correct Answer is B

Explanation

Fluid having a concentration of electrolytes that expands volume but does not cause a fluid shift in or out of the cells would be considered

Correct Answer is D

Explanation

Which is the most dangerous electrolyte imbalance?

Potassium is responsible for:

The patient with systemic edema is given Lasix to reduce the edema. A serious side effect of this diuretic is the promotion of hypokalemia, which may result in:

Weight gain or loss gives the nurse information regarding change in body fluids. The nurse should be aware that 1 liter of fluid weighs:

A cation that plays a major role in bone formation is:

The most abundant anion in plasma membranes is:

Which of the following body systems is the quickest to respond to changes in pH in the blood?