Podcast
Questions and Answers
What neurotransmitter is released by the cardio-acceleratory centre to increase heart rate?
What neurotransmitter is released by the cardio-acceleratory centre to increase heart rate?
Through which nerve does the cardio-inhibitory centre communicate with the sinoatrial node?
Through which nerve does the cardio-inhibitory centre communicate with the sinoatrial node?
What effect does the vagus nerve have on heart rate?
What effect does the vagus nerve have on heart rate?
Which part of the brain houses the cardiovascular centre responsible for heart rate regulation?
Which part of the brain houses the cardiovascular centre responsible for heart rate regulation?
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What is the primary role of stretch receptors in muscles in relation to the cardiovascular centre?
What is the primary role of stretch receptors in muscles in relation to the cardiovascular centre?
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During which stage of the cardiac cycle are the ventricles contracting?
During which stage of the cardiac cycle are the ventricles contracting?
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What is the total duration for the ventricles being relaxed over a one-minute period with a heartbeat of 60 beats per minute?
What is the total duration for the ventricles being relaxed over a one-minute period with a heartbeat of 60 beats per minute?
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What is the time duration of Stage B in the cardiac cycle?
What is the time duration of Stage B in the cardiac cycle?
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In which stage of the cardiac cycle are the atria relaxing and the ventricles relaxing?
In which stage of the cardiac cycle are the atria relaxing and the ventricles relaxing?
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If the heart is beating at 60 beats per minute, how many seconds are the atria contracting in total during one minute?
If the heart is beating at 60 beats per minute, how many seconds are the atria contracting in total during one minute?
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Which factor directly triggers an increased heart rate through hormonal response?
Which factor directly triggers an increased heart rate through hormonal response?
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How do chemoreceptors influence heart rate when CO₂ levels rise?
How do chemoreceptors influence heart rate when CO₂ levels rise?
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What effect does increased blood pressure have on heart rate regulation?
What effect does increased blood pressure have on heart rate regulation?
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What physiological response occurs due to muscular movement in relation to heart function?
What physiological response occurs due to muscular movement in relation to heart function?
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Which statement accurately describes the role of the medulla oblongata in heart rate regulation?
Which statement accurately describes the role of the medulla oblongata in heart rate regulation?
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What is the purpose of the AV valve in the heart?
What is the purpose of the AV valve in the heart?
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How do the tendinous cords function within the heart?
How do the tendinous cords function within the heart?
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What could happen if the AV valve were to malfunction?
What could happen if the AV valve were to malfunction?
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Which component of the heart ensures unidirectional blood flow during the cardiac cycle?
Which component of the heart ensures unidirectional blood flow during the cardiac cycle?
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If tendinous cords were damaged, what is the most likely effect on heart function?
If tendinous cords were damaged, what is the most likely effect on heart function?
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What is the primary function of the coronary artery?
What is the primary function of the coronary artery?
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Which blood vessel is the origin of the coronary artery?
Which blood vessel is the origin of the coronary artery?
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During which phase of the cardiac cycle do the atrioventricular valves open?
During which phase of the cardiac cycle do the atrioventricular valves open?
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Which event occurs when the ventricles are emptying?
Which event occurs when the ventricles are emptying?
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What happens to the semilunar valves during the cardiac cycle?
What happens to the semilunar valves during the cardiac cycle?
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What is the primary reason the left ventricle has thicker walls than the right ventricle?
What is the primary reason the left ventricle has thicker walls than the right ventricle?
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What characteristic do the left and right ventricles share regarding their blood output?
What characteristic do the left and right ventricles share regarding their blood output?
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Which of the following accurately describes blood flow through a mammalian heart?
Which of the following accurately describes blood flow through a mammalian heart?
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Which statement best describes the role of the left atrium in the heart?
Which statement best describes the role of the left atrium in the heart?
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Why is it crucial for the left and right ventricles to pump equal volumes of blood?
Why is it crucial for the left and right ventricles to pump equal volumes of blood?
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What occurs in the left ventricle between times P and Q during the cardiac cycle?
What occurs in the left ventricle between times P and Q during the cardiac cycle?
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At what point does the semilunar valve open in the cardiac cycle?
At what point does the semilunar valve open in the cardiac cycle?
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What is the significance of the decreasing volume in the left ventricle as observed from times P to Q?
What is the significance of the decreasing volume in the left ventricle as observed from times P to Q?
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How does the pressure in the left ventricle change during times P to Q?
How does the pressure in the left ventricle change during times P to Q?
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What is primarily responsible for the decrease in volume of the left ventricle during the cardiac cycle?
What is primarily responsible for the decrease in volume of the left ventricle during the cardiac cycle?
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What is the primary function of the sinoatrial node (SAN) in the heart?
What is the primary function of the sinoatrial node (SAN) in the heart?
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Why is the atrioventricular node (AVN) important in the cardiac cycle?
Why is the atrioventricular node (AVN) important in the cardiac cycle?
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What consequence would occur if there were no time delay for depolarization to travel from the atria to the ventricles?
What consequence would occur if there were no time delay for depolarization to travel from the atria to the ventricles?
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Which of the following best describes the process of depolarization in the heart?
Which of the following best describes the process of depolarization in the heart?
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What role does the sinoatrial node play in a healthy heart rhythm?
What role does the sinoatrial node play in a healthy heart rhythm?
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