Biology
Cardiovascular and Nervous System
981 Questions
Review the human cardiovascular system through these competitive exam practice questions. Key areas include heart valves, cardiac impulse pathways, and blood pressure regulation. A solid grasp of these fundamentals is crucial for science sections.
Heart anatomy and valvesCardiac impulse conductionBlood pressure mechanicsHeartbeat regulation
Cardiovascular and Nervous System Questions
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60-100
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80-130
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40-60
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10-30
A
Correct answer
Explanation
The normal resting heart rate for adults ranges between 60-100 beats per minute. This range is established by cardiovascular health standards and represents a healthy resting pulse. Athletes may have lower resting rates, but 60-100 is the general population range.
B
Correct answer
Explanation
Adult women typically have faster resting heart rates (approximately 70-80 beats per minute) than adult men (approximately 60-70 beats per minute). This is a well-documented physiological difference due to heart size and hormonal influences. The statement claiming men's hearts beat faster is incorrect.
B
Correct answer
Explanation
On average, women's hearts beat faster than men's hearts. The typical resting heart rate for adult women is 78-82 beats per minute, while for adult men it's 70-72 beats per minute. This difference is partly due to women's generally smaller heart size, which requires more frequent contractions to pump the same amount of blood.
B
Correct answer
Explanation
This is false - a seasoned athlete's heart actually beats slower at rest, not faster. This is called 'athlete's heart' or athletic bradycardia. Regular cardiovascular training makes the heart more efficient, so it can pump more blood per beat. Athletes typically have resting heart rates of 40-60 bpm, compared to 70-80 bpm for non-athletes.
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Brain
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Heart
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Kidneys
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Lungs
B
Correct answer
Explanation
Electrocardiogram (ECG) records the heart's electrical activity to diagnose cardiac conditions. EEG is for brain, kidney function uses different tests, and lungs are assessed with spirometry or X-rays.
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37 million times
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36 million times
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30 million times
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32 million times
A
Correct answer
Explanation
The human heart beats approximately 100,000 times per day. Over 365 days, this equals about 36.5 million beats per year, making 37 million the closest and most accurate approximation among the options.
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3000 tonnes in a Year
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3000 tonnes in a week
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3000 tonnes in a day
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3000 tonnes in a hour
A
Correct answer
Explanation
A healthy human heart beats approximately 100,000 (one lakh) times per day, averaging 60-100 beats per minute. Over 24 hours, this totals 100,000-115,000 beats, so 'more than one lakh' is correct.
B
Correct answer
Explanation
The normal resting heart rate for a healthy adult male ranges from 60-100 beats per minute, with 72 being the statistical average. 70 BPM falls within this normal range and is the closest option to the actual average.
A
Correct answer
Explanation
The human heart beats approximately 100,000 times per day. At an average resting heart rate of 70-80 beats per minute, it completes around 100,000-115,000 beats daily. This continuous pumping is essential for circulating blood throughout the body.
D
Correct answer
Explanation
The human heart has four valves: tricuspid, pulmonary, mitral, and aortic. These valves ensure one-way blood flow through the heart chambers and prevent backward flow, which is essential for efficient circulation.
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Brain
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Heart
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Kidneys
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Lungs
B
Correct answer
Explanation
ECG (electrocardiogram) records the heart's electrical activity and is used to diagnose heart conditions like arrhythmias, heart attacks, and conduction defects. It is not used for brain (EEG), kidneys, or lungs.
C
Correct answer
Explanation
The normal resting heart rate for adults ranges from 60-100 beats per minute, with 72 bpm being often cited as the average. Among the given options, 70 bpm is the closest to standard medical references for a healthy adult male. Heart rate can vary based on fitness level, age, and activity level.
B
Correct answer
Explanation
The human heart can generate enough pressure to squirt blood much farther than 1 foot - up to 30 feet or more. Normal systolic blood pressure can reach around 120 mmHg, which is sufficient to propel blood vertically against gravity. The '1 foot' distance is a significant underestimate, making the False statement correct.
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Rise in pulse
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Absence of Blood Pressure
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Fall in Blood Pressure
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Rise in Blood Pressure
D
Correct answer
Explanation
Hypertension is the medical term for high blood pressure - a condition where blood pressure in the arteries is persistently elevated. It's a major risk factor for heart disease, stroke, and other cardiovascular problems. Note: the question has 'Hyprtension' - a typo.