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Questions and Answers
What causes the first heart sound 'lub'?
What causes the first heart sound 'lub'?
- Closure of the aortic and pulmonic valves
- Passage of blood through the pulmonary veins
- Flow of blood into the right atrium
- Closure of the mitral and tricuspid valves (correct)
Which valve does blood pass through immediately after leaving the right ventricle?
Which valve does blood pass through immediately after leaving the right ventricle?
- Tricuspid valve
- Mitral valve
- Pulmonic valve (correct)
- Aortic valve
What is the role of the SA node in the heart's electrical activity?
What is the role of the SA node in the heart's electrical activity?
- Causing atrial repolarization
- Initiating heart muscle contractions (correct)
- Promoting ventricular relaxation
- Generating signals for ventricular contraction
Why is the left side of the heart thicker than the right side?
Why is the left side of the heart thicker than the right side?
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During an ECG, which wave represents atrial depolarization?
During an ECG, which wave represents atrial depolarization?
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Where does blood go immediately after passing through the mitral valve?
Where does blood go immediately after passing through the mitral valve?
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What is the main cause of angina pectoris?
What is the main cause of angina pectoris?
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Which side of the heart carries deoxygenated blood?
Which side of the heart carries deoxygenated blood?
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Which cardiac phase involves the contraction and pumping of blood out of the ventricles?
Which cardiac phase involves the contraction and pumping of blood out of the ventricles?
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What differs in resistance between the systemic and pulmonary circulation?
What differs in resistance between the systemic and pulmonary circulation?
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What is the formula for calculating cardiac output?
What is the formula for calculating cardiac output?
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What cellular process is involved in the pacemaker potential?
What cellular process is involved in the pacemaker potential?
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