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 D

Explanation

A. young adults: They have a relatively high percentage of body water (50–60%).

B. children: Children have more body water than adults.

C. infants: Infants have the highest body water content (~70–80%).

D. elderly adults: Aging leads to a decrease in lean body mass and total body water.

A. "You did the right thing to bring Tyler in. Babies can become dehydrated quickly." B. "Going with very little food for 24 hours is not too long for anyone." C. "Most of a baby's body is water, so he is probably very sick." D. "Babies have a large water reserve to replace diarrhea."

Correct Answer is A

Explanation

A. "You did the right thing to bring Tyler in. Babies can become dehydrated quickly.": Infants are vulnerable to dehydration due to their high water content and immature kidneys.

B. "Going with very little food for 24 hours is not too long for anyone.": This dismisses the concern and doesn't address dehydration risk.

C. "Most of a baby's body is water, so he is probably very sick.": While high water content is true, this statement is vague and potentially alarming.

D. "Babies have a large water reserve to replace diarrhea.": Infants dehydrate quickly because they have low fluid reserves.

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

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Naxlex Comprehensive Predictor Exams

The lowest percentage of body fluids occurs in:

Correct Answer is D

Explanation

Correct Answer is A

Explanation

The vitreous and aqueous humors are found in the:

The most abundant anion in plasma membranes is:

When patients take substances into the body, they first enter the extracellular compartment. In order to carry out their function, must enter the:

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

The most abundant electrolyte in the body is:

Water is lost from the body through:

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 7-year-old patient is admitted with vomiting and diarrhea of 3 days' duration. The patient is started on IV therapy. A sign that he is receiving too much or too rapid IV fluid, when compared with previous data would be: