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Questions and Answers
What is the role of the sinoatrial (SA) node in the heart?
What is the role of the sinoatrial (SA) node in the heart?
- It spreads action potentials quickly.
- It acts as the valve closure mechanism.
- It initiates the contraction of the heart. (correct)
- It is responsible for nutrient exchange.
Which part of the cardiac cycle is characterized by the contraction of the ventricles?
Which part of the cardiac cycle is characterized by the contraction of the ventricles?
- Atrial diastole
- Ventricular systole (correct)
- Ventricular diastole
- Atrial systole
Which type of blood vessel carries blood away from the heart?
Which type of blood vessel carries blood away from the heart?
- Arteries (correct)
- Veins
- Capillaries
- Vena cava
What produces the 'lubb' sound during the cardiac cycle?
What produces the 'lubb' sound during the cardiac cycle?
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What is considered a normal heart rate?
What is considered a normal heart rate?
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What is the primary function of the atrioventricular valves?
What is the primary function of the atrioventricular valves?
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Which component of the heart is responsible for generating blood pressure?
Which component of the heart is responsible for generating blood pressure?
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Which part of the heart separates the right atrium from the left atrium?
Which part of the heart separates the right atrium from the left atrium?
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What is the role of the coronary arteries in the cardiovascular system?
What is the role of the coronary arteries in the cardiovascular system?
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What is located in the pericardial cavity?
What is located in the pericardial cavity?
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