Podcast
Questions and Answers
What happens at 0mV in terms of ion channels?
What happens at 0mV in terms of ion channels?
- Ca++ channels open and K+ channels close
- Both Ca++ and K+ channels open
- Ca++ channels close and K+ channels open (correct)
- Both Ca++ and K+ channels close
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?
- Ca++ (correct)
- Na+
- Cl-
- K+
If not for endocrine control, how many times per minute would the SA node fire?
If not for endocrine control, how many times per minute would the SA node fire?
- 30 - 40 times
- 40 - 60 times
- 15 - 20 times
- 80 - 100 times (correct)
Which part of the heart has been recorded with the lowest heart rate of 28 BPM?
Which part of the heart has been recorded with the lowest heart rate of 28 BPM?
What abbreviations are commonly used to refer to the recording of electrical signals of the heart?
What abbreviations are commonly used to refer to the recording of electrical signals of the heart?
Where is the heart located?
Where is the heart located?
What structures attach at the base of the heart?
What structures attach at the base of the heart?
Which chamber of the heart collects blood and pushes it into the lower chambers?
Which chamber of the heart collects blood and pushes it into the lower chambers?
What type of blood does the pulmonary artery carry?
What type of blood does the pulmonary artery carry?
Which layer of the heart is described as the middle thickest layer, containing muscle cells, nerve fibers, and blood vessels?
Which layer of the heart is described as the middle thickest layer, containing muscle cells, nerve fibers, and blood vessels?
What structure produces lubricating fluid in the pericardial cavity?
What structure produces lubricating fluid in the pericardial cavity?
During the cardiac cycle, what process occurs when the ventricles are relaxed and filling with blood?
During the cardiac cycle, what process occurs when the ventricles are relaxed and filling with blood?
Which part of the heart's electrical conduction system is responsible for depolarization of the ventricles and masks atrial repolarization?
Which part of the heart's electrical conduction system is responsible for depolarization of the ventricles and masks atrial repolarization?
What is the primary function of artificial pacemakers in the context of cardiac muscle physiology?
What is the primary function of artificial pacemakers in the context of cardiac muscle physiology?
Which phase of the cardiac cycle involves the atria contracting after depolarization, known as 'atrial kick'?
Which phase of the cardiac cycle involves the atria contracting after depolarization, known as 'atrial kick'?
What term describes the amount of blood remaining in the ventricles after the stroke volume has been pushed out during ventricular systole?
What term describes the amount of blood remaining in the ventricles after the stroke volume has been pushed out during ventricular systole?
Which part of the cardiac cycle marks the relaxation phase when the semilunar valves close, and both the atrioventricular valves and semilunar valves are shut?
Which part of the cardiac cycle marks the relaxation phase when the semilunar valves close, and both the atrioventricular valves and semilunar valves are shut?
What is the function of the endothelium in the heart?
What is the function of the endothelium in the heart?
Which type of muscle cells make up 99% of the cardiac muscle and are responsible for pumping blood through the body?
Which type of muscle cells make up 99% of the cardiac muscle and are responsible for pumping blood through the body?
Which chamber in the heart receives oxygenated blood from the pulmonary veins?
Which chamber in the heart receives oxygenated blood from the pulmonary veins?
What is the primary function of the atrioventricular (AV) node in the heart's conduction system?
What is the primary function of the atrioventricular (AV) node in the heart's conduction system?
Which valve disorder is usually caused by inflammation in the heart?
Which valve disorder is usually caused by inflammation in the heart?
What is the primary role of the semilunar valves in the heart?
What is the primary role of the semilunar valves in the heart?
Which structure divides the heart into chambers and has physical extensions of myocardium?
Which structure divides the heart into chambers and has physical extensions of myocardium?
In cardiac muscle cells, what is the function of desmosomes located at intercalated discs?
In cardiac muscle cells, what is the function of desmosomes located at intercalated discs?
Which statement accurately describes Purkinje fibers in the heart's conduction system?
Which statement accurately describes Purkinje fibers in the heart's conduction system?
What is the role of coronary circulation in the heart?
What is the role of coronary circulation in the heart?
What is the function of the atrioventricular valves?
What is the function of the atrioventricular valves?
What causes heart murmurs?
What causes heart murmurs?
What is the formula to calculate Cardiac Output (CO)?
What is the formula to calculate 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 contributes to an increase in Cardiac Output during exercise?
Which factor contributes to an increase in Cardiac Output during exercise?
What is the role of vagal stimulation in the autonomic control of the heart?
What is the role of vagal stimulation in the autonomic control of the heart?
How does caffeine affect heart rate?
How does caffeine affect heart rate?
