Podcast
Questions and Answers
What happens at 0mV in terms of ion channels?
What happens at 0mV in terms of ion channels?
- Both Ca++ and K+ channels close
- Ca++ channels close and K+ channels open (correct)
- Ca++ channels open and K+ channels close
- Both Ca++ and K+ channels open
What slows down the repolarization phase by allowing for the plateau in cardiac action potentials?
What slows down the repolarization phase by allowing for the plateau in cardiac action potentials?
- Cl- ions
- Ca++ ions (correct)
- Na+ ions
- K+ ions
If the SA node were not under endocrine control, how many times per minute would it fire based on the text?
If the SA node were not under endocrine control, how many times per minute would it fire based on the text?
- Less than 10 times per minute
- Over 150 times per minute
- 80 - 100 times per minute (correct)
- 20 - 30 times per minute
Which part of the heart's conduction system would fire at the slowest rate according to the text?
Which part of the heart's conduction system would fire at the slowest rate according to the text?
What is another name for an Electrocardiogram (ECG)?
What is another name for an Electrocardiogram (ECG)?
What is the sound heard when the atrioventricular valves close?
What is the sound heard when the atrioventricular valves close?
Which phase of the cardiac cycle does S2 represent?
Which phase of the cardiac cycle does S2 represent?
What does S4 indicate about the heart?
What does S4 indicate about the heart?
What is the formula for Cardiac Output (CO)?
What is the formula for Cardiac Output (CO)?
What does the ejection fraction represent?
What does the ejection fraction represent?
What is the function of the atria in the heart?
What is the function of the atria in the heart?
Where is the base of the heart located?
Where is the base of the heart located?
Which chamber of the heart connects to the pulmonary trunk?
Which chamber of the heart connects to the pulmonary trunk?
Which artery carries deoxygenated blood in the heart?
Which artery carries deoxygenated blood in the heart?
What is the role of the myocardium in the heart?
What is the role of the myocardium in the heart?
Which layer of the heart produces lubricating fluid?
Which layer of the heart produces lubricating fluid?
What is the main purpose of AED's in the context of cardiac issues?
What is the main purpose of AED's in the context of cardiac issues?
During which phase of the cardiac cycle does diastole occur?
During which phase of the cardiac cycle does diastole occur?
What is the significance of the T wave in the context of cardiac muscle metabolism?
What is the significance of the T wave in the context of cardiac muscle metabolism?
What is the role of myoglobin in heart cells?
What is the role of myoglobin in heart cells?
Which phase of the cardiac cycle involves the semilunar valves being closed while blood flows into the atria and ventricles?
Which phase of the cardiac cycle involves the semilunar valves being closed while blood flows into the atria and ventricles?
What is the amount of blood pushed out by the ventricles known as?
What is the amount of blood pushed out by the ventricles known as?
What is the main function of the endothelium in the heart?
What is the main function of the endothelium in the heart?
Which structure in the heart separates the atria from the ventricles?
Which structure in the heart separates the atria from the ventricles?
What is the function of the moderator band in the heart?
What is the function of the moderator band in the heart?
What is the primary role of semilunar valves in the heart?
What is the primary role of semilunar valves in the heart?
During which phase does the left ventricle of the heart receive oxygenated blood?
During which phase does the left ventricle of the heart receive oxygenated blood?
What is the function of desmosomes in cardiac muscle cells?
What is the function of desmosomes in cardiac muscle cells?
Where is the Sinoatrial (SA) node located in the heart?
Where is the Sinoatrial (SA) node located in the heart?
What is the role of Purkinje fibers in cardiac conduction?
What is the role of Purkinje fibers in cardiac conduction?
