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Questions and Answers
What is the main function of the lungs in the respiratory system?
Gas exchange
Define blood pressure.
The force of blood pushing against the wall of arteries
What does blood volume refer to?
Total amount of blood circulating within the veins, capillaries, etc.
What is stroke volume?
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Differentiate between resting heart rate and working heart rate.
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Study Notes
Respiratory System
- The main function of the lungs is to facilitate the exchange of oxygen and carbon dioxide through the process of respiration.
Cardiovascular System
- Blood pressure is the force exerted by blood on the walls of blood vessels, measured in millimeters of mercury (mmHg).
- Blood volume refers to the total amount of blood present in the body, which is approximately 5 liters in an average adult.
- Stroke volume is the amount of blood pumped by the heart with each beat, averaging around 70-80 mL per beat in a healthy adult.
Heart Rate
- Resting heart rate is the heart rate measured when the body is at rest, typically ranging from 60-100 beats per minute (bpm).
- Working heart rate, also known as exercise heart rate, is the heart rate measured during physical activity, increasing depending on the intensity of the exercise.
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Description
Test your knowledge on the respiratory system and lungs where gas exchange occurs, as well as the cardiovascular system that delivers oxygen and nutrients throughout the body. Explore concepts such as gas exchange, blood pressure, and blood volume.
