Podcast
Questions and Answers
What is the function of the atria in the heart?
What is the function of the atria in the heart?
- Separate the heart from other structures
- Collect blood and push it into lower chambers (correct)
- Connect to the pulmonary trunk
- Pump blood out to the body
Where is the heart located in the body?
Where is the heart located in the body?
- Above the diaphragm
- Between the lungs in the mediastinum (correct)
- Behind the stomach
- Below the liver
Which structure separates the heart from other structures?
Which structure separates the heart from other structures?
- Pulmonary trunk
- Aorta
- Pericardium (correct)
- Coronary artery
What is the role of the pulmonary vein?
What is the role of the pulmonary vein?
Which layer of the heart is most superficial?
Which layer of the heart is most superficial?
What are auricles in relation to the heart?
What are auricles in relation to the heart?
What happens at 0mV in terms of ion channels during typical repolarization?
What happens at 0mV in terms of ion channels during typical repolarization?
What prevents premature contractions in the cardiac cycle?
What prevents premature contractions in the cardiac cycle?
Which ion binds to troponin to allow the myosin and actin cross bridge?
Which ion binds to troponin to allow the myosin and actin cross bridge?
If the AV node were to fire at 75 times per minute, what would be an expected outcome?
If the AV node were to fire at 75 times per minute, what would be an expected outcome?
What is the purpose of an electrocardiogram (ECG or EKG)?
What is the purpose of an electrocardiogram (ECG or EKG)?
What is the role of the P wave in the cardiac cycle?
What is the role of the P wave in the cardiac cycle?
Which condition is an interruption in the normal conduction pathway of the heart?
Which condition is an interruption in the normal conduction pathway of the heart?
What is the primary function of an artificial pacemaker?
What is the primary function of an artificial pacemaker?
During which phase of the cardiac cycle does blood flow into the atria and through into the ventricles?
During which phase of the cardiac cycle does blood flow into the atria and through into the ventricles?
What is the main purpose of the isovolumic ventricular relaxation phase in the cardiac cycle?
What is the main purpose of the isovolumic ventricular relaxation phase in the cardiac cycle?
How is stroke volume defined in relation to the cardiac cycle?
How is stroke volume defined in relation to the cardiac cycle?
Which heart sound is caused by the closing of atrioventricular valves?
Which heart sound is caused by the closing of atrioventricular valves?
What is the percentage range for normal ejection fraction?
What is the percentage range for normal ejection fraction?
What controls the nervous regulation of heart rate from the medulla oblongata?
What controls the nervous regulation of heart rate from the medulla oblongata?
What does sympathetic stimulation release that shortens the repolarization period?
What does sympathetic stimulation release that shortens the repolarization period?
What causes an increase in parasympathetic stimulation according to the baroreceptor reflex?
What causes an increase in parasympathetic stimulation according to the baroreceptor reflex?
Which factor can lead to a decrease in heart rate?
Which factor can lead to a decrease in heart rate?
Which structure divides the heart into chambers and are physical extensions of the myocardium?
Which structure divides the heart into chambers and are physical extensions of the myocardium?
What is the main function of endothelins released by the endothelium?
What is the main function of endothelins released by the endothelium?
Which valves separate the atria from ventricles in the heart?
Which valves separate the atria from ventricles in the heart?
What is the main function of the moderator band in the right ventricle?
What is the main function of the moderator band in the right ventricle?
Where does the left atrium receive blood from?
Where does the left atrium receive blood from?
Which valves ensure unidirectional blood flow in the heart?
Which valves ensure unidirectional blood flow in the heart?
What happens during a heart murmur caused by valve disorders?
What happens during a heart murmur caused by valve disorders?
Which of the following is responsible for setting the normal cardiac rhythm and known as the pacemaker?
Which of the following is responsible for setting the normal cardiac rhythm and known as the pacemaker?
Plateau phase in cardiac muscle cells occurs at which membrane potential?
Plateau phase in cardiac muscle cells occurs at which membrane potential?
Desmosomes in cardiac muscle cells serve to prevent what from happening?
Desmosomes in cardiac muscle cells serve to prevent what from happening?
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