What is the most significant solute in determining the distribution of water among fluid compartments?
Na+
Cl-
Ca2+
K+
Pi
The Correct Answer is A
A. Na⁺ (Sodium): Sodium is the major extracellular cation and is the primary determinant of extracellular fluid volume and osmosis.
B. Cl⁻ (Chloride): Important, but usually follows sodium; not the primary driver of water distribution.
C. Ca²⁺ (Calcium): Vital for many functions but not the main regulator of fluid distribution.
D. K⁺ (Potassium): Primary intracellular cation, but sodium has a greater role in overall water movement across compartments.
E. Pi (Phosphate): Mainly intracellular; important in buffering and metabolism but not in water distribution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Nasal vestibule: The nasal vestibule is the anterior part of the nasal cavity just inside the nostrils, lined with skin and hair.
B. Nasal cavity: The nasal cavity is a large air-filled space behind the nose, extending from the nostrils to the choanae.
C. Nasal concha: The nasal conchae are curved bony projections (superior, middle, and inferior) inside the nasal cavity that increase the surface area for warming and humidifying air.
D. Sphenoid sinus: The sphenoid sinus is a hollow space within the sphenoid bone, located posterior to the nasal cavity and inferior to the sella turcica.
Correct Answer is {"dropdown-group-1":"A","dropdown-group-2":"A"}
Explanation
A. Proteins and carbohydrates; fats: Both proteins and carbohydrates yield approximately 4 kcal/g, while fats yield about 9 kcal/g due to their dense hydrocarbon structure.
B. Proteins; fats and carbohydrates: Carbohydrates do not yield 9 kcal/g; only fats do.
C. Fats; carbohydrates and proteins: Fats yield more energy, not less.
D. Carbohydrates; fats and proteins: Proteins and carbohydrates are equal in kcal/g; fats are higher.
E. Carbohydrates and fats; proteins: Fats yield the highest kcal/g, not proteins.
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