Podcast
Questions and Answers
During the cardiac cycle, what is the significance of the P wave?
During the cardiac cycle, what is the significance of the P wave?
- Represents atrial relaxation
- Marks the beginning of ventricular systole
- Indicates depolarization of the atria (correct)
- Signifies repolarization of the ventricles
Which part of the cardiac cycle corresponds to ventricular relaxation?
Which part of the cardiac cycle corresponds to ventricular relaxation?
- Ventricular systole
- Diastole
- Isovolumic ventricular relaxation phase (correct)
- Atrial systole
What is the primary function of an artificial pacemaker?
What is the primary function of an artificial pacemaker?
- Correcting fibrillations
- Interruption in the normal conduction pathway
- Storing oxygen in muscle cells
- Ensuring effective heart contractions through electrical impulses (correct)
Which phase of the cardiac cycle involves the highest pressure in the ventricles?
Which phase of the cardiac cycle involves the highest pressure in the ventricles?
What is the primary function of a defibrillator designed to correct?
What is the primary function of a defibrillator designed to correct?
How does an increase in stroke volume affect the end systolic volume (ESV)?
How does an increase in stroke volume affect the end systolic volume (ESV)?
What is the role of Ca++ channels at 0mV during repolarization?
What is the role of Ca++ channels at 0mV during repolarization?
What would be the heart rate range of the Atrioventricular bundle if not for endocrine control?
What would be the heart rate range of the Atrioventricular bundle if not for endocrine control?
What is the main purpose of an ECG or EKG?
What is the main purpose of an ECG or EKG?
Which component of the heart's conduction system fires at the lowest rate?
Which component of the heart's conduction system fires at the lowest rate?
What happens when Ca++ binds to troponin during a heart contraction?
What happens when Ca++ binds to troponin during a heart contraction?
What is the function of the atria in the heart?
What is the function of the atria in the heart?
Which layer of the heart produces lubricating fluid for the pericardial cavity?
Which layer of the heart produces lubricating fluid for the pericardial cavity?
Where is the cardiac notch located?
Where is the cardiac notch located?
Which chamber of the heart connects to the aorta?
Which chamber of the heart connects to the aorta?
What is the size of a typical human heart?
What is the size of a typical human heart?
Which artery carries deoxygenated blood in the heart?
Which artery carries deoxygenated blood in the heart?
What is the function of endothelium in the heart?
What is the function of endothelium in the heart?
Which chamber of the heart has a small contractile phase and contains pectinate muscles?
Which chamber of the heart has a small contractile phase and contains pectinate muscles?
What is the purpose of the moderator band in the heart?
What is the purpose of the moderator band in the heart?
Why do semilunar valves make an audible sound as they close?
Why do semilunar valves make an audible sound as they close?
Which valves close due to papillary muscles contracting?
Which valves close due to papillary muscles contracting?
What is anastomosis in relation to coronary circulation?
What is anastomosis in relation to coronary circulation?
Which cells in the heart conduct impulses and contract to pump blood through the body?
Which cells in the heart conduct impulses and contract to pump blood through the body?
Where are T tubules found in cardiac muscle cells?
Where are T tubules found in cardiac muscle cells?
What is the percentage range for the normal ejection fraction in the heart?
What is the percentage range for the normal ejection fraction in the heart?
Which phase of the heart sounds corresponds to the closing of semilunar valves?
Which phase of the heart sounds corresponds to the closing of semilunar valves?
What is the formula for calculating Cardiac Output (CO)?
What is the formula for calculating Cardiac Output (CO)?
What might be a consequence of high heart rates leading to decreased filling time?
What might be a consequence of high heart rates leading to decreased filling time?
Which nerve dominates the autonomic tone of the heart?
Which nerve dominates the autonomic tone of the heart?
What conditions can decrease heart rate?
What conditions can decrease heart rate?
At what stage do atrioventricular valves typically form during fetal development?
At what stage do atrioventricular valves typically form during fetal development?
What is the target range to maintain a high Cardiac Output during exercise?
What is the target range to maintain a high Cardiac Output during exercise?
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