Podcast
Questions and Answers
What is the function of the atria in the heart?
What is the function of the atria in the heart?
- Connect to the aorta
- Pump blood to the body
- Collect blood and push it into lower chambers (correct)
- Carry oxygenated blood
Where is the base of the heart located?
Where is the base of the heart located?
- Posterior to the pericardium
- Inferior and lateral to the apex
- Anterior to the mediastinum
- Superior and medial to the apex (correct)
Which vessel attaches at the base of the heart?
Which vessel attaches at the base of the heart?
- Pulmonary vein
- Aorta (correct)
- Inferior vena cava
- Pulmonary artery
Where is the epicardium located in relation to the myocardium?
Where is the epicardium located in relation to the myocardium?
Which vessels are responsible for carrying deoxygenated blood to the lungs?
Which vessels are responsible for carrying deoxygenated blood to the lungs?
What is the main purpose of the pericardial cavity?
What is the main purpose of the pericardial cavity?
What is the function of Ca++ channels at 0mV in repolarization?
What is the function of Ca++ channels at 0mV in repolarization?
If the endocrine control was absent, how many times per minute would the AV node fire?
If the endocrine control was absent, how many times per minute would the AV node fire?
What is the purpose of Ca++ binding to troponin during muscle contraction?
What is the purpose of Ca++ binding to troponin during muscle contraction?
What would be the heart rate range if the Purkinje fibers were firing at 15 - 20 times per minute?
What would be the heart rate range if the Purkinje fibers were firing at 15 - 20 times per minute?
What would happen if the Ca++ channels remained open during repolarization?
What would happen if the Ca++ channels remained open during repolarization?
During which phase of the cardiac cycle does the P wave represent the depolarization of the atria?
During which phase of the cardiac cycle does the P wave represent the depolarization of the atria?
What is the main function of an artificial pacemaker in the context of heart function?
What is the main function of an artificial pacemaker in the context of heart function?
Which of the following is characteristic of the T wave in the cardiac cycle?
Which of the following is characteristic of the T wave in the cardiac cycle?
In which phase of the cardiac cycle is the blood pushed out by the ventricles known as end diastolic volume (EDV) or preload?
In which phase of the cardiac cycle is the blood pushed out by the ventricles known as end diastolic volume (EDV) or preload?
Which of the following statements correctly describes the role of myoglobin in heart cells?
Which of the following statements correctly describes the role of myoglobin in heart cells?
During which phase of the cardiac cycle do semilunar valves close and atrioventricular valves are also closed?
During which phase of the cardiac cycle do semilunar valves close and atrioventricular valves are also closed?
What is the percentage range for normal ejection fraction?
What is the percentage range for normal ejection fraction?
Which heart sound is associated with blood being pushed into a stiff or hypertrophic ventricle?
Which heart sound is associated with blood being pushed into a stiff or hypertrophic ventricle?
What does an increased level of thyroid hormone do to heart rate and contractility?
What does an increased level of thyroid hormone do to heart rate and contractility?
Which neurotransmitter is released during parasympathetic stimulation of the heart?
Which neurotransmitter is released during parasympathetic stimulation of the heart?
What does caffeine and nicotine do to heart rate?
What does caffeine and nicotine do to heart rate?
Which reflex involves pressure and stretch leading to increased parasympathetic stimulation of the heart?
Which reflex involves pressure and stretch leading to increased parasympathetic stimulation of the heart?
What can cause a decrease in heart rate?
What can cause a decrease in heart rate?
'S7' is referred to when both which sounds are present at the same time?
'S7' is referred to when both which sounds are present at the same time?
'Cardiac reserve' is defined as the difference between which two values?
'Cardiac reserve' is defined as the difference between which two values?
What is the function of the endothelium in the heart?
What is the function of the endothelium in the heart?
Which type of valve separates the atria from the ventricles in the heart?
Which type of valve separates the atria from the ventricles in the heart?
Where does the right ventricle receive deoxygenated blood from?
Where does the right ventricle receive deoxygenated blood from?
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 function of coronary circulation in the heart?
What is the primary function of coronary circulation in the heart?
What feature allows ions to travel between adjacent cardiac muscle cells?
What feature allows ions to travel between adjacent cardiac muscle cells?
Which structure in the heart slows down impulses and forces contraction of the atrioventricular septum?
Which structure in the heart slows down impulses and forces contraction of the atrioventricular septum?
What happens to Na+ channels in cardiac conductive cells during spontaneous depolarization?
What happens to Na+ channels in cardiac conductive cells during spontaneous depolarization?
What is the main characteristic of cardiac contractile cells during repolarization?
What is the main characteristic of cardiac contractile cells during repolarization?
What initiates an electrical potential at a fixed rate in cardiac muscle cells?
What initiates an electrical potential at a fixed rate in cardiac muscle cells?
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