Podcast
Questions and Answers
What is the function of Ca++ binding to troponin in the heart?
What is the function of Ca++ binding to troponin in the heart?
- Allowing the myosin and actin cross bridge (correct)
- Creating the QRS complex in an ECG
- Causing the SA node to fire
- Preventing premature contractions
What is the key purpose of the P wave in an electrocardiogram (ECG)?
What is the key purpose of the P wave in an electrocardiogram (ECG)?
- Depolarization of the atria (correct)
- Repolarization of the atria
- Repolarization of ventricles
- Depolarization of ventricles
Which component of an ECG is responsible for masking the repolarization of the atria?
Which component of an ECG is responsible for masking the repolarization of the atria?
- QRS complex (correct)
- P wave
- Atrial fibrillation
- T wave
What is the main role of an artificial pacemaker in cardiac physiology?
What is the main role of an artificial pacemaker in cardiac physiology?
If someone has a heart block, what type of interruption occurs in their heart's conduction pathway?
If someone has a heart block, what type of interruption occurs in their heart's conduction pathway?
Which region of the heart would fire at 80 - 100 times per minute if not for endocrine control?
Which region of the heart would fire at 80 - 100 times per minute if not for endocrine control?
What is the function of atria in the heart?
What is the function of atria in the heart?
Where is the pericardium located in the heart?
Where is the pericardium located in the heart?
Which structure connects the right ventricle to the pulmonary trunk?
Which structure connects the right ventricle to the pulmonary trunk?
What is the function of the great veins and arteries attached at the base of the heart?
What is the function of the great veins and arteries attached at the base of the heart?
Which layer of the heart produces lubricating fluid for smooth movement?
Which layer of the heart produces lubricating fluid for smooth movement?
What is the main function of auricles in the heart?
What is the main function of auricles in the heart?
Which layer of the heart is continuous with the lining of the blood vessels?
Which layer of the heart is continuous with the lining of the blood vessels?
What separates the atria from the ventricles in the heart?
What separates the atria from the ventricles in the heart?
What is the function of semilunar valves in the heart?
What is the function of semilunar valves in the heart?
Which chamber of the heart receives oxygenated blood from the pulmonary veins?
Which chamber of the heart receives oxygenated blood from the pulmonary veins?
What term describes the interconnections of blood vessels that allow blood to flow even if there is a partial blockage?
What term describes the interconnections of blood vessels that allow blood to flow even if there is a partial blockage?
Which type of cells in cardiac muscle initiate and propagate the action potential through the heart?
Which type of cells in cardiac muscle initiate and propagate the action potential through the heart?
What is the main function of desmosomes in cardiac muscle cells?
What is the main 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 happens when Na+ channels close at +30mV in cardiac contractile cells?
What happens when Na+ channels close at +30mV in cardiac contractile cells?
What is the primary function of Purkinje fibers in cardiac conduction?
What is the primary function of Purkinje fibers in cardiac conduction?
How do semilunar valves close?
How do semilunar valves close?
What is T tubule distribution like in cardiac muscle cells?
What is T tubule distribution like in cardiac muscle cells?
