OLERE Study Guide Exam Questions And
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
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1. Which principle is most important when beginning the assessment
of any patient?
A. Prescribing medication immediately
B. Performing a systematic assessment
C. Obtaining laboratory results first
D. Waiting for imaging studies
Answer: B. Performing a systematic assessment
Rationale: A systematic assessment ensures that life-threatening
conditions are recognized promptly and important findings are not
overlooked. It provides the foundation for safe and effective clinical
decision-making.
, 2. Which body system is primarily responsible for gas exchange?
A. Digestive system
B. Respiratory system
C. Urinary system
D. Endocrine system
Answer: B. Respiratory system
Rationale: The respiratory system exchanges oxygen and carbon dioxide
between the lungs and the bloodstream, maintaining normal
oxygenation and acid-base balance.
3. What is considered the normal resting heart rate for most healthy
adults?
A. 20–40 beats per minute
B. 40–60 beats per minute
C. 60–100 beats per minute
D. 120–160 beats per minute
Answer: C. 60–100 beats per minute
Rationale: A normal adult resting heart rate typically ranges from 60 to
100 beats per minute, although physically fit individuals may have lower
rates.
, 4. Which vital sign best reflects oxygenation status?
A. Blood pressure
B. Pulse oximetry
C. Body temperature
D. Pain score
Answer: B. Pulse oximetry
Rationale: Pulse oximetry measures the percentage of hemoglobin
saturated with oxygen, providing a rapid assessment of oxygenation.
5. Which organ is primarily responsible for filtering blood and
producing urine?
A. Liver
B. Pancreas
C. Kidney
D. Spleen
Answer: C. Kidney
Rationale: The kidneys remove waste products, regulate electrolytes,
maintain fluid balance, and produce urine.
, 6. Which chamber of the heart pumps oxygenated blood into the
systemic circulation?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D. Left ventricle
Rationale: The left ventricle generates enough pressure to pump
oxygen-rich blood throughout the body via the aorta.
7. Which electrolyte plays the greatest role in normal cardiac
conduction?
A. Calcium
B. Potassium
C. Magnesium
D. Phosphorus
Answer: B. Potassium
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
1. Which principle is most important when beginning the assessment
of any patient?
A. Prescribing medication immediately
B. Performing a systematic assessment
C. Obtaining laboratory results first
D. Waiting for imaging studies
Answer: B. Performing a systematic assessment
Rationale: A systematic assessment ensures that life-threatening
conditions are recognized promptly and important findings are not
overlooked. It provides the foundation for safe and effective clinical
decision-making.
, 2. Which body system is primarily responsible for gas exchange?
A. Digestive system
B. Respiratory system
C. Urinary system
D. Endocrine system
Answer: B. Respiratory system
Rationale: The respiratory system exchanges oxygen and carbon dioxide
between the lungs and the bloodstream, maintaining normal
oxygenation and acid-base balance.
3. What is considered the normal resting heart rate for most healthy
adults?
A. 20–40 beats per minute
B. 40–60 beats per minute
C. 60–100 beats per minute
D. 120–160 beats per minute
Answer: C. 60–100 beats per minute
Rationale: A normal adult resting heart rate typically ranges from 60 to
100 beats per minute, although physically fit individuals may have lower
rates.
, 4. Which vital sign best reflects oxygenation status?
A. Blood pressure
B. Pulse oximetry
C. Body temperature
D. Pain score
Answer: B. Pulse oximetry
Rationale: Pulse oximetry measures the percentage of hemoglobin
saturated with oxygen, providing a rapid assessment of oxygenation.
5. Which organ is primarily responsible for filtering blood and
producing urine?
A. Liver
B. Pancreas
C. Kidney
D. Spleen
Answer: C. Kidney
Rationale: The kidneys remove waste products, regulate electrolytes,
maintain fluid balance, and produce urine.
, 6. Which chamber of the heart pumps oxygenated blood into the
systemic circulation?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D. Left ventricle
Rationale: The left ventricle generates enough pressure to pump
oxygen-rich blood throughout the body via the aorta.
7. Which electrolyte plays the greatest role in normal cardiac
conduction?
A. Calcium
B. Potassium
C. Magnesium
D. Phosphorus
Answer: B. Potassium
