Podcast
Questions and Answers
What is the function of the atria in the heart?
What is the function of the atria in the heart?
- Produce lubricating fluid
- Collect blood and push it into lower chambers (correct)
- Pump blood out to the body or lungs
- Hold blood and empty into atria
Which vein carries deoxygenated blood?
Which vein carries deoxygenated blood?
- Pulmonary vein (correct)
- Aorta
- Inferior vena cava
- Superior vena cava
Where is the heart located within the body?
Where is the heart located within the body?
- Underneath the liver
- Behind the stomach
- Between the kidneys
- In a space called the mediastinum (correct)
Which layer of the heart produces lubricating fluid?
Which layer of the heart produces lubricating fluid?
What is the purpose of the fat-filled grooves called sulci in the heart?
What is the purpose of the fat-filled grooves called sulci in the heart?
Which chamber of the heart pumps blood out to the body or lungs?
Which chamber of the heart pumps blood out to the body or lungs?
What happens at 0mV during repolarization?
What happens at 0mV during repolarization?
Which ion is responsible for the plateau phase in cardiac action potentials?
Which ion is responsible for the plateau phase in cardiac action potentials?
What is the firing rate of the SA node without endocrine control?
What is the firing rate of the SA node without endocrine control?
Which part of the heart's conduction system has the slowest firing rate?
Which part of the heart's conduction system has the slowest firing rate?
What is the purpose of using electrodes on the body during an ECG?
What is the purpose of using electrodes on the body during an ECG?
During which phase of the cardiac cycle do the atria contract following depolarization?
During which phase of the cardiac cycle do the atria contract following depolarization?
What is the main function of an artificial pacemaker in the context of cardiac muscle activity?
What is the main function of an artificial pacemaker in the context of cardiac muscle activity?
What happens to the pressure in the heart during ventricular systole?
What happens to the pressure in the heart during ventricular systole?
Which component of the ECG represents the repolarization of the ventricles?
Which component of the ECG represents the repolarization of the ventricles?
What is the significance of myoglobin in heart muscle cells?
What is the significance of myoglobin in heart muscle cells?
Which phase of the cardiac cycle marks the relaxation of both the ventricles and atria?
Which phase of the cardiac cycle marks the relaxation of both the ventricles and atria?
Which heart sound is associated with the closing of semilunar valves?
Which heart sound is associated with the closing of semilunar valves?
What does S4 indicate in terms of blood flow in the heart?
What does S4 indicate in terms of blood flow in the heart?
In cardiac physiology, what is the formula for Cardiac Output (CO)?
In cardiac physiology, what is the formula for Cardiac Output (CO)?
What percentage range is considered normal for the ejection fraction of the heart?
What percentage range is considered normal for the ejection fraction of the heart?
What can increase Cardiac Output by 4-8 times?
What can increase Cardiac Output by 4-8 times?
Where does nervous control of heart rate primarily originate from?
Where does nervous control of heart rate primarily originate from?
Which neurotransmitter slows down the rate of depolarization in the heart?
Which neurotransmitter slows down the rate of depolarization in the heart?
What increases heart rate and often accompanies a surge in cortisol?
What increases heart rate and often accompanies a surge in cortisol?
What is the function of endothelins released by the endothelium?
What is the function of endothelins released by the endothelium?
Where is the fossa ovalis located?
Where is the fossa ovalis located?
What is the function of the moderator band in the heart?
What is the function of the moderator band in the heart?
What happens during the plateau phase in cardiac contractile cells?
What happens during the plateau phase in cardiac contractile cells?
Why do cardiac muscle cells have a long refractory period?
Why do cardiac muscle cells have a long refractory period?
Where is the sinoatrial (SA) node located?
Where is the sinoatrial (SA) node located?
What is the main function of the atrioventricular (AV) node?
What is the main function of the atrioventricular (AV) node?
What is the purpose of bundle of His in the heart's conduction system?
What is the purpose of bundle of His in the heart's conduction system?
Why do semilunar valves make an audible sound as they close?
Why do semilunar valves make an audible sound as they close?
What is the role of desmosomes in cardiac muscle cells?
What is the role of desmosomes in cardiac muscle cells?
