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Human anatomy nln nex practice EXAM ALL
QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES LATEST UPDATE JUST RELEASED
THIS YEAR
Question: What are the smallest blood vessels in the body?
A. Arterioles
B. Capillaries
C. Veins
D. Venules
. - CORRECT ANSWER✔✔Answer: B. Capillaries
Explanation: Capillaries are the thinnest and smallest blood vessels, enabling exchange of
oxygen, carbon dioxide, and nutrients with tissues
Question: What is the function of capillaries?
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A. Store red blood cells
B. Carry blood away from the heart
C. Allow exchange of materials with tissues
D. Pump blood back to the lungs - CORRECT ANSWER✔✔Answer: C. Allow exchange of
materials with tissues
Explanation: Capillaries are where gas, nutrient, and waste exchange occurs between blood and
surrounding tissues.
Question: How does blood return to the heart?
A. Through arteries
B. Through capillaries
C. Through lymphatic vessels
D. Through veins - CORRECT ANSWER✔✔Answer: D. Through veins
Explanation: Veins carry deoxygenated blood from the tissues back to the heart (except
pulmonary veins, which carry oxygenated blood from the lungs).
Question: What is the liquid portion of blood called?
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A. Lymph
B. Serum
C. Plasma
D. Platelets - CORRECT ANSWER✔✔Answer: C. Plasma
Explanation: Plasma is the yellowish fluid that makes up the majority of blood volume and
carries nutrients, hormones, and waste.
Question: What does plasma contain?
A. Red and white blood cells
B. Enzymes and electrolytes
C. Dissolved nutrients and minerals
D. Antibodies and insulin - CORRECT ANSWER✔✔Answer: C. Dissolved nutrients and minerals
Explanation: Plasma contains water, nutrients, minerals, and proteins to support cellular
functions.
Question: What is the function of red blood cells (RBCs)?
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A. Prevent infections
B. Transport oxygen using hemoglobin
C. Form clots
D. Attack bacteria directly - CORRECT ANSWER✔✔Answer: B. Transport oxygen using
hemoglobin
Explanation: RBCs contain hemoglobin, which binds to oxygen and carries it from the lungs to
tissues.
Question: What is the function of white blood cells (WBCs)?
A. Carry carbon dioxide
B. Prevent dehydration
C. Fight infections and destroy pathogens
D. Regulate pH - CORRECT ANSWER✔✔Answer: C. Fight infections and destroy pathogens
Explanation: WBCs are immune cells that detect and eliminate harmful microbes like bacteria
and viruses.
Question: What is the role of platelets?
4
SUCCESS!
Human anatomy nln nex practice EXAM ALL
QUESTIONS AND CORRECT VERIFIED ANSWERS
WITH RATIONALES LATEST UPDATE JUST RELEASED
THIS YEAR
Question: What are the smallest blood vessels in the body?
A. Arterioles
B. Capillaries
C. Veins
D. Venules
. - CORRECT ANSWER✔✔Answer: B. Capillaries
Explanation: Capillaries are the thinnest and smallest blood vessels, enabling exchange of
oxygen, carbon dioxide, and nutrients with tissues
Question: What is the function of capillaries?
1
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,Page 2 of 118
A. Store red blood cells
B. Carry blood away from the heart
C. Allow exchange of materials with tissues
D. Pump blood back to the lungs - CORRECT ANSWER✔✔Answer: C. Allow exchange of
materials with tissues
Explanation: Capillaries are where gas, nutrient, and waste exchange occurs between blood and
surrounding tissues.
Question: How does blood return to the heart?
A. Through arteries
B. Through capillaries
C. Through lymphatic vessels
D. Through veins - CORRECT ANSWER✔✔Answer: D. Through veins
Explanation: Veins carry deoxygenated blood from the tissues back to the heart (except
pulmonary veins, which carry oxygenated blood from the lungs).
Question: What is the liquid portion of blood called?
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A. Lymph
B. Serum
C. Plasma
D. Platelets - CORRECT ANSWER✔✔Answer: C. Plasma
Explanation: Plasma is the yellowish fluid that makes up the majority of blood volume and
carries nutrients, hormones, and waste.
Question: What does plasma contain?
A. Red and white blood cells
B. Enzymes and electrolytes
C. Dissolved nutrients and minerals
D. Antibodies and insulin - CORRECT ANSWER✔✔Answer: C. Dissolved nutrients and minerals
Explanation: Plasma contains water, nutrients, minerals, and proteins to support cellular
functions.
Question: What is the function of red blood cells (RBCs)?
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A. Prevent infections
B. Transport oxygen using hemoglobin
C. Form clots
D. Attack bacteria directly - CORRECT ANSWER✔✔Answer: B. Transport oxygen using
hemoglobin
Explanation: RBCs contain hemoglobin, which binds to oxygen and carries it from the lungs to
tissues.
Question: What is the function of white blood cells (WBCs)?
A. Carry carbon dioxide
B. Prevent dehydration
C. Fight infections and destroy pathogens
D. Regulate pH - CORRECT ANSWER✔✔Answer: C. Fight infections and destroy pathogens
Explanation: WBCs are immune cells that detect and eliminate harmful microbes like bacteria
and viruses.
Question: What is the role of platelets?
4
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