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Questions and Answers
What happens to the arteries when the left ventricle contracts?
What happens to the arteries when the left ventricle contracts?
- They remain the same
- They rupture
- They constrict
- They expand (correct)
What is the normal range of pulse beats per minute?
What is the normal range of pulse beats per minute?
- 60 to 120
- 60 to 100 (correct)
- 80 to 140
- 40 to 80
What does the pulse indicate?
What does the pulse indicate?
- The strength of the heart
- The amount of blood pumped
- The frequency of the heart rate (correct)
- The pressure of the blood
What is the purpose of measuring the pulse rate?
What is the purpose of measuring the pulse rate?
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What is the average pulse rate?
What is the average pulse rate?
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Study Notes
Heart Function and Pulse
- When the left ventricle contracts, it forces approximately 70ml of blood into the aorta and arteries.
- Arteries expand as blood is forced into them due to their elastic walls.
- As the wave of blood passes, arteries relax, only to expand again with the next wave of blood.
- The expansion and recoil of arteries is the pulse.
- Pulse serves as an indication of the frequency of the heart rate.
Pulse Rate (Heart Rate)
- Rate is defined as the number of pulse beats in a minute.
- Normal pulse rate (heart rate) ranges from 60 to 100 beats per minute.
- The average pulse rate (heart rate) is 72 beats per minute.
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