AIIMS BBSR SNO - 2019
Applied Physiology
Easy
The pH of arterial plasma in healthy individuals is?
Appeared in: AIIMS BBSR SNO - 2019
Explanation
- 4, which is the average pH of arterial blood in a healthy person.
- The normal physiological range for arterial blood pH is very narrow, from 7.35 to 7.45.
- This slightly alkaline state is essential for the proper functioning of enzymes, metabolic processes, and oxygen delivery to tissues.
- The body's buffer systems, along with the lungs and kidneys, work continuously to maintain this precise balance.
Why Other Options Were Wrong
- Option A: A pH of 7.5 is above the normal range of 7.35-7.45. This value indicates a state of mild alkalosis, where the blood is too basic.
- Option B: A pH of 7.6 is significantly above the normal range and indicates a more severe state of alkalosis. This level of imbalance can be dangerous.
- Option D: A pH of 7.2 is below the normal range of 7.35-7.45. This value indicates a state of acidosis, where the blood is too acidic.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Normal arterial blood pH as background academic context rather than a clinical decision trigger.
- Nurses frequently monitor patients' acid-base balance through Arterial Blood Gas (ABG) analysis, especially in critical care settings.
- Understanding the normal pH range is fundamental for interpreting ABG results and identifying life-threatening conditions like acidosis or alkalosis.
- The nurse's role includes proper collection of ABG samples, interpreting the results in the context of the patient's condition, and implementing prescribed interventions.
How to Approach the Question
- First, identify the key concept in the question, which is the normal pH of arterial plasma.
- This is a factual recall question that requires knowledge of basic human physiology.
- Recall the specific normal range for arterial blood pH, which is 7.35 to 7.45.
- Evaluate the given options to see which one falls within this normal range.
- Option 7.4 is the standard average value within the 7.35-7.45 range, making it the most accurate answer.
Concept Tested & Keywords
- Concept Tested: Normal arterial blood pH
- Stem keywords: pH, arterial plasma, healthy individuals
- Lead-in keywords: BEST, MOST RELEVANT CLUE
- Negative lead-in flag: false
Question ID
QmGie7W5mcLL1a_CbZ2RdV
Reference Book
E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 54-56
E6 Physiology Guyton 4SAE Part 2B p. 66-68
Practise the full AIIMS BBSR SNO - 2019
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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