NCLEX Questions: 50 NCLEX
Questions With Answers and
Detailed Explanations
Question 1
What is the normal range for adult blood pressure?
A) 90/60 mmHg
B) 120/80 mmHg
C) 140/90 mmHg
D) 160/100 mmHg
Answer: B) 120/80 mmHg
Explanation: The normal blood pressure range for a healthy adult is typically around
120/80 mmHg. This value can vary slightly depending on individual health conditions,
but it serves as a general guideline for normal blood pressure.
Question 2
Which vitamin is essential for calcium absorption in the body?
A) Vitamin A
B) Vitamin B12
C) Vitamin C
D) Vitamin D
Answer: D) Vitamin D
Explanation: Vitamin D is crucial for the absorption of calcium in the intestines.
Without adequate vitamin D, the body cannot absorb calcium effectively, which can
lead to bone disorders such as osteoporosis.
Question 3
What is the primary function of red blood cells?
, A) Fight infections
B) Transport oxygen
C) Clot blood
D) Produce antibodies
Answer: B) Transport oxygen
Explanation: Red blood cells contain hemoglobin, a protein that binds to oxygen in
the lungs and carries it to tissues throughout the body. This is their primary function.
Question 4
Which organ is responsible for filtering blood and producing urine?
A) Liver
B) Heart
C) Kidney
D) Pancreas
Answer: C) Kidney
Explanation: The kidneys filter waste products from the blood and produce urine.
They play a critical role in maintaining the body's fluid and electrolyte balance.
Question 5
What is the normal range for adult respiratory rate?
A) 8-12 breaths per minute
B) 12-20 breaths per minute
C) 20-28 breaths per minute
D) 28-36 breaths per minute
Answer: B) 12-20 breaths per minute
Explanation: The normal respiratory rate for a healthy adult is between 12 and 20
breaths per minute. Rates outside this range may indicate respiratory distress or other
health issues.
Question 6
, Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A) Hypernatremia
B) Hypokalemia
C) Hypercalcemia
D) Hypomagnesemia
Answer: B) Hypokalemia
Explanation: Low potassium levels (hypokalemia) can lead to cardiac arrhythmias
because potassium is essential for maintaining normal electrical activity in the heart.
Question 7
What is the primary purpose of administering insulin to a diabetic patient?
A) Increase blood glucose levels
B) Decrease blood glucose levels
C) Increase blood pressure
D) Decrease blood pressure
Answer: B) Decrease blood glucose levels
Explanation: Insulin helps lower blood glucose levels by facilitating the uptake of
glucose into cells, where it can be used for energy.
Question 8
Which part of the brain is responsible for regulating balance and coordination?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Hypothalamus
Answer: B) Cerebellum
Explanation: The cerebellum is responsible for coordinating voluntary movements,
balance, and posture. It ensures smooth and balanced muscular activity.
Question 9
Questions With Answers and
Detailed Explanations
Question 1
What is the normal range for adult blood pressure?
A) 90/60 mmHg
B) 120/80 mmHg
C) 140/90 mmHg
D) 160/100 mmHg
Answer: B) 120/80 mmHg
Explanation: The normal blood pressure range for a healthy adult is typically around
120/80 mmHg. This value can vary slightly depending on individual health conditions,
but it serves as a general guideline for normal blood pressure.
Question 2
Which vitamin is essential for calcium absorption in the body?
A) Vitamin A
B) Vitamin B12
C) Vitamin C
D) Vitamin D
Answer: D) Vitamin D
Explanation: Vitamin D is crucial for the absorption of calcium in the intestines.
Without adequate vitamin D, the body cannot absorb calcium effectively, which can
lead to bone disorders such as osteoporosis.
Question 3
What is the primary function of red blood cells?
, A) Fight infections
B) Transport oxygen
C) Clot blood
D) Produce antibodies
Answer: B) Transport oxygen
Explanation: Red blood cells contain hemoglobin, a protein that binds to oxygen in
the lungs and carries it to tissues throughout the body. This is their primary function.
Question 4
Which organ is responsible for filtering blood and producing urine?
A) Liver
B) Heart
C) Kidney
D) Pancreas
Answer: C) Kidney
Explanation: The kidneys filter waste products from the blood and produce urine.
They play a critical role in maintaining the body's fluid and electrolyte balance.
Question 5
What is the normal range for adult respiratory rate?
A) 8-12 breaths per minute
B) 12-20 breaths per minute
C) 20-28 breaths per minute
D) 28-36 breaths per minute
Answer: B) 12-20 breaths per minute
Explanation: The normal respiratory rate for a healthy adult is between 12 and 20
breaths per minute. Rates outside this range may indicate respiratory distress or other
health issues.
Question 6
, Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A) Hypernatremia
B) Hypokalemia
C) Hypercalcemia
D) Hypomagnesemia
Answer: B) Hypokalemia
Explanation: Low potassium levels (hypokalemia) can lead to cardiac arrhythmias
because potassium is essential for maintaining normal electrical activity in the heart.
Question 7
What is the primary purpose of administering insulin to a diabetic patient?
A) Increase blood glucose levels
B) Decrease blood glucose levels
C) Increase blood pressure
D) Decrease blood pressure
Answer: B) Decrease blood glucose levels
Explanation: Insulin helps lower blood glucose levels by facilitating the uptake of
glucose into cells, where it can be used for energy.
Question 8
Which part of the brain is responsible for regulating balance and coordination?
A) Cerebrum
B) Cerebellum
C) Brainstem
D) Hypothalamus
Answer: B) Cerebellum
Explanation: The cerebellum is responsible for coordinating voluntary movements,
balance, and posture. It ensures smooth and balanced muscular activity.
Question 9
