A nurse is reinforcing teaching to a graduating nurse about fluid volume deficit. Which of the following concepts about water balance should the nurse explain to the graduating nurse?
The intracellular space contains most of the body's water.
A fluid volume deficit inhibits baroreceptors.
When the body loses water, the intravascular space experiences the water loss.
A negative fluid balance occurs when the body takes in more water than the body needs.
The Correct Answer is C
A. The intracellular space contains most of the body's water: While it is true that the intracellular space holds the majority of the body's water, this statement does not specifically relate to the concept of fluid volume deficit or how the body responds to it.
B. A fluid volume deficit inhibits baroreceptors: In fact, fluid volume deficit activates baroreceptors due to reduced blood pressure, leading to compensatory mechanisms like increased heart rate and vasoconstriction to maintain blood pressure.
C. When the body loses water, the intravascular space experiences the water loss: This statement accurately describes the process during fluid volume deficit. The intravascular space loses water, leading to decreased blood volume, which can result in symptoms like hypotension and reduced tissue perfusion.
D. A negative fluid balance occurs when the body takes in more water than the body needs: This statement is incorrect; a negative fluid balance occurs when the body loses more water than it takes in, leading to dehydration or fluid volume deficit.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Hyperventilation: Hyperventilation is more commonly associated with respiratory alkalosis or anxiety rather than hypokalemia. Hypokalemia does not typically cause hyperventilation.
B. Bradypnea: Bradypnea (slow breathing) is not a common finding in hypokalemia. Hypokalemia can affect muscle function, including respiratory muscles, but bradypnea is not a characteristic sign.
C. Syncope: While syncope (fainting) can occur due to various conditions, it is not a specific or common finding directly associated with hypokalemia. Hypokalemia mainly affects the heart and muscles.
D. U waves on electrocardiogram: U waves are a classic electrocardiogram (ECG) finding associated with hypokalemia. These waves appear after the T wave and are indicative of the electrolyte imbalance affecting cardiac repolarization.
Correct Answer is D
Explanation
A. "Water moves from areas where the concentration of sodium is higher to areas where the concentration is lower.": This statement incorrectly describes the direction of water movement. Water typically moves towards areas of higher solute concentration (higher sodium levels) through osmosis.
B. "Sodium moves from areas where the concentration of solute is lower to areas where the concentration is higher.": Sodium does not move this way in dehydration; the main issue is the movement of water, not sodium, in response to osmotic gradients.
C. "Water and sodium particles move together to areas where sodium particles are higher.": Water and sodium do not move together. Water follows solute (sodium) through osmotic processes, but sodium does not move in this manner during dehydration.
D. "Water moves from areas where the concentration of sodium is lower to the areas where the concentration of sodium is higher.": This statement correctly explains the principle of osmosis. In dehydration, water is lost from the body, leading to higher sodium concentration in the blood. This higher concentration draws water from cells to balance the osmotic pressure, resulting in elevated sodium levels.
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