Circulatory System and Heart - Case Studies
Q. What is the average resting heart rate for adults?
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A.
40-60 beats per minute
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B.
60-100 beats per minute
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C.
100-120 beats per minute
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D.
120-140 beats per minute
Solution
The average resting heart rate for adults is typically between 60-100 beats per minute.
Correct Answer: B — 60-100 beats per minute
Q. What is the main purpose of the coronary arteries?
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A.
To supply blood to the lungs
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B.
To supply blood to the heart muscle
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C.
To drain blood from the heart
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D.
To regulate heart rhythm
Solution
The coronary arteries supply blood to the heart muscle itself, providing it with oxygen and nutrients.
Correct Answer: B — To supply blood to the heart muscle
Q. What is the significance of the pulmonary circulation?
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A.
It delivers oxygen to the body
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B.
It removes carbon dioxide from the body
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C.
It circulates blood between the heart and lungs
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D.
It regulates blood pressure
Solution
Pulmonary circulation is significant as it circulates blood between the heart and lungs for oxygenation.
Correct Answer: C — It circulates blood between the heart and lungs
Q. Which component of blood is primarily responsible for clotting?
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A.
Red blood cells
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B.
White blood cells
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C.
Platelets
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D.
Plasma
Solution
Platelets are the component of blood primarily responsible for clotting.
Correct Answer: C — Platelets
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