Podcast
Questions and Answers
Where is the heart located in the body?
Where is the heart located in the body?
- Below the diaphragm
- Above the liver
- Between the kidneys
- In the mediastinum between the lungs (correct)
Which structure separates the heart from other structures?
Which structure separates the heart from other structures?
- Endocardium
- Myocardium
- Pericardium (correct)
- Epicardium
Which chamber of the heart collects blood and pushes it into lower chambers?
Which chamber of the heart collects blood and pushes it into lower chambers?
- Auricle
- Sulcus
- Ventricle
- Atrium (correct)
What is the main function of ventricles in the heart?
What is the main function of ventricles in the heart?
Which layer of the heart produces lubricating fluid?
Which layer of the heart produces lubricating fluid?
What is the middle thickest layer of the heart made up of?
What is the middle thickest layer of the heart made up of?
What happens at 0mV with Ca++ and K+ channels?
What happens at 0mV with Ca++ and K+ channels?
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 not for endocrine control, how many times would the SA node fire per minute?
If not for endocrine control, how many times would the SA node fire per minute?
Which part of the heart's conduction system would fire 30 - 40 times per minute?
Which part of the heart's conduction system would fire 30 - 40 times per minute?
What do electrodes on the body record when performing an ECG?
What do electrodes on the body record when performing an ECG?
During which phase of the cardiac cycle does the depolarization of the atria occur?
During which phase of the cardiac cycle does the depolarization of the atria occur?
What is the purpose of artificial pacemakers in the heart?
What is the purpose of artificial pacemakers in the heart?
Which part of the heart's electrical activity masks the repolarization of the atria?
Which part of the heart's electrical activity masks the repolarization of the atria?
What characterizes the end-systolic volume (ESV) of the ventricles?
What characterizes the end-systolic volume (ESV) of the ventricles?
What is the primary purpose of AEDs in relation to cardiac issues?
What is the primary purpose of AEDs in relation to cardiac issues?
What is the role of myoglobin in heart cells?
What is the role of myoglobin in heart cells?
Which layer of the heart is responsible for releasing endothelins, strong vasoconstrictors?
Which layer of the heart is responsible for releasing endothelins, strong vasoconstrictors?
How many septa are found in the heart?
How many septa are found in the heart?
Which valve separates the right atrium from the right ventricle?
Which valve separates the right atrium from the right ventricle?
What feature is unique to the left ventricle compared to the right ventricle?
What feature is unique to the left ventricle compared to the right ventricle?
What causes the closure of tricuspid and mitral valves?
What causes the closure of tricuspid and mitral valves?
Which coronary artery brings blood to the myocardium and other components?
Which coronary artery brings blood to the myocardium and other components?
What is the function of desmosomes in cardiac muscle cells?
What is the function of desmosomes in cardiac muscle cells?
Where is the SA node located in the heart?
Where is the SA node located in the heart?
What is the function of Purkinje fibers in the heart?
What is the function of Purkinje fibers in the heart?
What happens at +30mV in cardiac contractile cells?
What happens at +30mV in cardiac contractile cells?
What is the function of S1 heart sound?
What is the function of S1 heart sound?
What event is likely to happen before the S1 and S2 heart sounds?
What event is likely to happen before the S1 and S2 heart sounds?
What is the formula for calculating Cardiac Output (CO)?
What is the formula for calculating Cardiac Output (CO)?
What is the normal range for Cardiac Output (CO) in liters per minute?
What is the normal range for Cardiac Output (CO) in liters per minute?
Which factor can decrease Heart Rate?
Which factor can decrease Heart Rate?
What is the effect of caffeine and nicotine on Heart Rate?
What is the effect of caffeine and nicotine on Heart Rate?
From where does the nervous control of Heart Rate come?
From where does the nervous control of Heart Rate come?
What is the primary effect of sympathetic stimulation on Heart Rate?
What is the primary effect of sympathetic stimulation on Heart Rate?
'Atrial reflex' results in what response to increased blood in the atria?
'Atrial reflex' results in what response to increased blood in the atria?
'Stroke Volume' can be compensated for by what factor if filling time decreases?
'Stroke Volume' can be compensated for by what factor if filling time decreases?
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