Podcast
Questions and Answers
During atrial systole, what happens to the pressure in the ventricles?
During atrial systole, what happens to the pressure in the ventricles?
- It remains the same.
- It fluctuates significantly.
- It decreases.
- It increases. (correct)
What is responsible for creating the pulse in the circulatory system?
What is responsible for creating the pulse in the circulatory system?
- The opening of the AV valves.
- Pressure waves from the semilunar valves closing. (correct)
- The contraction of the ventricles.
- The relaxation of the atria.
Which structure acts as the 'pacemaker' of the heart and sets the rhythm of the heartbeat?
Which structure acts as the 'pacemaker' of the heart and sets the rhythm of the heartbeat?
- AV valves
- Semilunar valves
- Sino-atrial node (correct)
- Ventricles
What happens to artery pressure compared to ventricle pressure during ventricular systole?
What happens to artery pressure compared to ventricle pressure during ventricular systole?
Which phase of the cardiac cycle involves the closure of the AV valves?
Which phase of the cardiac cycle involves the closure of the AV valves?
How does cardiac output relate to heart rate and stroke volume?
How does cardiac output relate to heart rate and stroke volume?
What prevents the atrioventricular valves from turning inside out when the ventricle walls contract?
What prevents the atrioventricular valves from turning inside out when the ventricle walls contract?
Where does the deoxygenated blood enter after passing through the tricuspid valves?
Where does the deoxygenated blood enter after passing through the tricuspid valves?
Which blood vessels supply oxygenated blood to the heart muscle?
Which blood vessels supply oxygenated blood to the heart muscle?
What is the function of intercalated discs in muscle cells?
What is the function of intercalated discs in muscle cells?
Where does the blood move after being pumped out of the left ventricle?
Where does the blood move after being pumped out of the left ventricle?
What is the purpose of semilunar valves in the heart?
What is the purpose of semilunar valves in the heart?
What is the main function of the atrioventricular node (AVN) in the cardiac cycle?
What is the main function of the atrioventricular node (AVN) in the cardiac cycle?
Which part of the heart is responsible for conducting waves of electrical activity to the Purkyne tissue?
Which part of the heart is responsible for conducting waves of electrical activity to the Purkyne tissue?
What does the T wave represent in an ECG trace?
What does the T wave represent in an ECG trace?
Which condition is characterized by an extremely irregular heartbeat, potentially causing chest pain and fainting?
Which condition is characterized by an extremely irregular heartbeat, potentially causing chest pain and fainting?
What is the role of haemoglobin in blood circulation?
What is the role of haemoglobin in blood circulation?
How does tachycardia differ from bradycardia?
How does tachycardia differ from bradycardia?
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