Podcast
Questions and Answers
What is the role of the atria in the heart?
What is the role of the atria in the heart?
- Collect blood and push it into lower chambers (correct)
- Hold blood and empty into atria
- Pump blood out to the body or lungs
- Produce lubricating fluid
Which chamber of the heart connects to the pulmonary trunk?
Which chamber of the heart connects to the pulmonary trunk?
- Left atrium
- Left ventricle
- Right atrium
- Right ventricle (correct)
In which cavity does the heart sit?
In which cavity does the heart sit?
- Cardiac notch
- Pulmonary cavity
- Pericardial cavity (correct)
- Mediastinum
What is the size of a typical heart?
What is the size of a typical heart?
Which artery is the only one to carry deoxygenated blood?
Which artery is the only one to carry deoxygenated blood?
What is the thickest layer in the heart, containing muscle cells, nerve fibers, and blood vessels?
What is the thickest layer in the heart, containing muscle cells, nerve fibers, and blood vessels?
What happens at 0mV in terms of ion channels?
What happens at 0mV in terms of ion channels?
Which component of the heart's conduction system fires at the lowest rate per minute?
Which component of the heart's conduction system fires at the lowest rate per minute?
What slows down the firing rate of the SA node below its intrinsic rate?
What slows down the firing rate of the SA node below its intrinsic rate?
What is the purpose of electrodes placed on the body during an electrocardiogram (ECG)?
What is the purpose of electrodes placed on the body during an electrocardiogram (ECG)?
What effect does Ca++ have on the myosin and actin cross bridge?
What effect does Ca++ have on the myosin and actin cross bridge?
What is the purpose of AED's in correcting fibrillations?
What is the purpose of AED's in correcting fibrillations?
During which phase of the cardiac cycle do the semilunar valves close?
During which phase of the cardiac cycle do the semilunar valves close?
What is the main function of an artificial pacemaker?
What is the main function of an artificial pacemaker?
Which component of the cardiac cycle involves the pumping of blood into circulation?
Which component of the cardiac cycle involves the pumping of blood into circulation?
What does the T wave in an ECG represent?
What does the T wave in an ECG represent?
How much blood is normally pushed out by the ventricles in one stroke during the cardiac cycle?
How much blood is normally pushed out by the ventricles in one stroke during the cardiac cycle?
What causes the second audible sound 'S2' in a healthy heart?
What causes the second audible sound 'S2' in a healthy heart?
What does the presence of both S3 and S4 sounds indicate in a cardiac examination?
What does the presence of both S3 and S4 sounds indicate in a cardiac examination?
What is the formula for calculating Cardiac Output (CO) in a healthy individual?
What is the formula for calculating Cardiac Output (CO) in a healthy individual?
What is the normal range for the Ejection Fraction in a cardiac assessment?
What is the normal range for the Ejection Fraction in a cardiac assessment?
How does exercise affect Cardiac Output (CO) in an individual?
How does exercise affect Cardiac Output (CO) in an individual?
What is the purpose of determining the target heart rate during exercise?
What is the purpose of determining the target heart rate during exercise?
What is the function of endothelins released by the endothelium?
What is the function of endothelins released by the endothelium?
Which structure divides the heart into chambers?
Which structure divides the heart into chambers?
What is the major difference between the right atrium and the left atrium?
What is the major difference between the right atrium and the left atrium?
Which valve ensures unidirectional blood flow?
Which valve ensures unidirectional blood flow?
During coronary circulation, what is the purpose of anastomosis?
During coronary circulation, what is the purpose of anastomosis?
What is the function of autorhythmicity in cardiac muscle cells?
What is the function of autorhythmicity in cardiac muscle cells?
What is the role of desmosomes in cardiac muscle cells?
What is the role of desmosomes in cardiac muscle cells?
Where is the Sinoatrial (SA) node located?
Where is the Sinoatrial (SA) node located?
What happens to cardiac conductive cells during spontaneous depolarization?
What happens to cardiac conductive cells during spontaneous depolarization?
Why do cardiac contractile cells have a long refractory period?
Why do cardiac contractile cells have a long refractory period?
