Everyday Science · Circulatory System (Human Biology) · page 2 of 9

Heart MCQs with Answers

Includes 15 past paper MCQs (marked).

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Heart MCQs (11–20)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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11.
In human heart blood returning from lungs first drains into the _?
Correct Answer: C. Left atrium
One-liner
Blood returning from the lungs first drains into the left atrium of the heart.
12.
Past Paper MCQ
The average heartbeat per minute in a normal man is _?
Correct Answer: B. 70
One-liner
The average heartbeat per minute in a normal adult man is 70 beats per minute.
13.
Pacemaker of heart is ?
Correct Answer: C. Sino-Atrial Node
One-liner
The pacemaker of the heart is the Sino-Atrial Node (SA Node).
14.
During sleep a man's blood pressure is ?
Correct Answer: B. Decrease
One-liner
During sleep, a man's blood pressure decreases due to reduced metabolic activity and parasympathetic nervous system dominance.
15.
Which is the hollow muscular organ located behind the sternum and between the lungs?
Correct Answer: B. Heart
One-liner
The heart is the hollow muscular organ located behind the sternum (breastbone) and between the two lungs.
16.
What is the average adult pulse rate?
Correct Answer: D. 60-80 beats per minute
One-liner
The average adult pulse rate is 60-80 beats per minute at rest.
17.
The average human heart beats about?
Correct Answer: D. 72 times per minute
One-liner
The average human heart beats about 72 times per minute at rest.
18.
Who discovered the blood circulatory system?
Correct Answer: A. William Harvey
One-liner
The blood circulatory system was discovered by William Harvey, an English physician who described it in his 1628 book *De Motu Cordis*.
19.
Which of the following is considered a cause of heart attack?
Correct Answer: A. High cholesterol
One-liner
High cholesterol is a major cause of heart attack because it leads to plaque buildup in arteries, restricting blood flow to the heart.
20.
Which of the following keeps the circulation of blood in the body?
Correct Answer: A. Cardiovascular system
One-liner
The cardiovascular system is responsible for keeping the circulation of blood throughout the body.

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Heart MCQs with Answers

Heart MCQs (11–20)

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