MP NHM CHO-2024 (Shift-2)
Applied Physiology
Easy
______ fluid represents the 2/3 of Total Body Weight.
Appeared in: MP NHM CHO-2024 (Shift-2)
Explanation
- Total body water constitutes about 60% of an adult's body weight.
- Intracellular fluid (ICF) is the fluid found within the body's cells.
- ICF makes up approximately two-thirds (2/3) of the total body water, which is the largest fluid compartment.
- This volume corresponds to about 40% of the total body weight in an average adult.
- While the question uses 'Total Body Weight', it conventionally refers to the proportion of 'Total Body Water' in this context.
Why Other Options Were Wrong
- Option A: Transcellular fluid is a very small, specialized component of the extracellular fluid (e.g., cerebrospinal, synovial fluid) and constitutes only about 1% of body weight, not two-thirds.
- Option B: Interstitial fluid is the fluid that surrounds the cells. It is the largest component of the extracellular fluid but represents only about 11-12% of total body weight, which is much less than two-thirds.
- Option D: Extracellular fluid (ECF) represents all the fluid outside the cells. It makes up about one-third of total body water (or 20% of body weight), not two-thirds.
Related Visual
- Visual 1: Diagram: A pie chart or bar graph illustrating the distribution of total body water into Intracellular Fluid (ICF, ~67%) and Extracellular Fluid (ECF, ~33%).
- Visual 2: Flowchart: A diagram showing the breakdown of Total Body Weight -> Total Body Water -> ICF and ECF, with ECF further breaking down into Interstitial, Plasma, and Transcellular fluid, with percentages for each.
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Distribution of Body Fluid Compartments as background academic context rather than a clinical decision trigger.
- Understanding fluid compartments is fundamental for nurses to manage intravenous (IV) fluid therapy, as different IV solutions are designed to expand specific compartments (e.g., intravascular, interstitial, or intracellular).
- Assessment of a patient's hydration status (dehydration or overhydration/edema) requires knowledge of where fluid shifts occur. For example, edema is the accumulation of excess fluid in the interstitial space.
- What if? If a patient receives a hypertonic IV solution, water will shift out of the intracellular compartment and into the extracellular compartment to balance solute concentrations, potentially causing cellular dehydration. This is a critical consideration in fluid management.
How to Approach the Question
- First, identify the key terms in the question: 'fluid', '2/3', and 'Total Body Weight'.
- Recall the basic distribution of body fluids. Total body water is about 60% of body weight.
- Remember the primary division of total body water: two-thirds is inside the cells (intracellular) and one-third is outside the cells (extracellular).
- Recognize that while the question states 'Total Body Weight', it's a common convention in nursing exams to relate this fraction to 'Total Body Water'.
- Calculate the proportion: 2/3 of Total Body Water is the largest fluid volume.
- Match this '2/3' proportion to the correct compartment, which is the Intracellular Fluid (ICF).
Concept Tested & Keywords
- Concept Tested: Distribution of Body Fluid Compartments
- Stem keywords: fluid, 2/3, Total Body Weight
- Lead-in keywords: BEST, MOST RELEVANT CLUE
- Negative lead-in flag: false
Question ID
QoDjfIkJWO4PoBsYCHzDlj
Reference Book
E6 Guide to Mental Health & PSYCHIATRIC NURSING R Sreevani 6th Edition — Part 2 (pp 290-564 of 579) p. 547-579
Practise the full MP NHM CHO-2024 (Shift-2)
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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