Podcast
Questions and Answers
In the cardiac cycle, which event is correctly correlated with the opening of the aortic valve?
In the cardiac cycle, which event is correctly correlated with the opening of the aortic valve?
- A: Atrial relaxation, A-V valve closes
- C: Mitral valve opens on the beginning of rapid inflow
- B: Diastasis, all valves are open (correct)
- D: Isovolumic relaxation, open A-V valves
On the volume-pressure diagram, which phase includes atrial contraction?
On the volume-pressure diagram, which phase includes atrial contraction?
- A: Mitral valve opens
- D: Aortic valve opens
- B: Aortic valve closes
- C: Mitral valve closes (correct)
Which statement about the cardiac muscle action potential is correct?
Which statement about the cardiac muscle action potential is correct?
- D. Cardiac muscle is refractory to restimulation during the action potential. (correct)
- B. Potentials are conducted from the atrial syncytium into the ventricular syncytium only by the A-V bundle.
- C. The atria provide the major source of power for moving blood through the body’s vascular system.
- A. The heart is composed of three major types of cardiac muscle: atrial muscle, ventricular muscle, and specialized excitatory neurons.
Which event in the cardiac cycle is correctly correlated with isovolumetric relaxation and open A-V valves?
Which event in the cardiac cycle is correctly correlated with isovolumetric relaxation and open A-V valves?
Which phase of the cardiac cycle includes rapid inflow and an open mitral valve?
Which phase of the cardiac cycle includes rapid inflow and an open mitral valve?
Which curve on the volume-pressure diagram represents atrial pressure?
Which curve on the volume-pressure diagram represents atrial pressure?
Which of the following statements about the composition of faeces is true?
Which of the following statements about the composition of faeces is true?
What causes the odor of faeces?
What causes the odor of faeces?
Which statement about the cardiac cycle for left ventricular function is correct?
Which statement about the cardiac cycle for left ventricular function is correct?
What role does aldosterone play in sodium transport capability?
What role does aldosterone play in sodium transport capability?
Which ion is absorbed in an exchange transport process by the mucosa of the large intestine?
Which ion is absorbed in an exchange transport process by the mucosa of the large intestine?
What causes the brown color of faeces?
What causes the brown color of faeces?
Which of the following statements about the strength of contraction of cardiac muscle is correct?
Which of the following statements about the strength of contraction of cardiac muscle is correct?
What occurs during the period of isovolumic (isometric) relaxation in the cardiac cycle?
What occurs during the period of isovolumic (isometric) relaxation in the cardiac cycle?
Which statement about the A-V valves and the semilunar valves is correct?
Which statement about the A-V valves and the semilunar valves is correct?
What does the electrocardiogram (ECG) wave represent?
What does the electrocardiogram (ECG) wave represent?
What happens when the left ventricular pressure rises slightly above 8 mm Hg in the cardiac cycle?
What happens when the left ventricular pressure rises slightly above 8 mm Hg in the cardiac cycle?
Which of the following statements about the ejection fraction is correct?
Which of the following statements about the ejection fraction is correct?
During diastole, what happens to the volume of each ventricle?
During diastole, what happens to the volume of each ventricle?
When does the pressure in the aorta increase?
When does the pressure in the aorta increase?
When does the pressure in the left ventricle increase?
When does the pressure in the left ventricle increase?
When does the A-V valve close?
When does the A-V valve close?
Which statement about heart sounds is correct?
Which statement about heart sounds is correct?
Which statement accurately describes the afterload of the left ventricle?
Which statement accurately describes the afterload of the left ventricle?
Which statement accurately describes the effect of vagal stimulation on the heart?
Which statement accurately describes the effect of vagal stimulation on the heart?
Which statement accurately describes the effect of body temperature on the heart?
Which statement accurately describes the effect of body temperature on the heart?
Which statement accurately describes the effect of potassium concentration on the heart?
Which statement accurately describes the effect of potassium concentration on the heart?
Which statement accurately describes the cardiac muscle contraction process?
Which statement accurately describes the cardiac muscle contraction process?
Which effect is accurately associated with sympathetic stimulation on the heart and vessels?
Which effect is accurately associated with sympathetic stimulation on the heart and vessels?
In the rhythmical and conductive system of the heart, what is the purpose of the internodal pathways?
In the rhythmical and conductive system of the heart, what is the purpose of the internodal pathways?
What is the intrinsic discharge rate of the A-V valve in the normal heart?
What is the intrinsic discharge rate of the A-V valve in the normal heart?
After closing of the mitral valve, what happens to the intraventricular pressure?
After closing of the mitral valve, what happens to the intraventricular pressure?
Which structure brings depolarization from the S-A node according to the organization of the atrioventricular (A-V) node?
Which structure brings depolarization from the S-A node according to the organization of the atrioventricular (A-V) node?
What happens if the conductive system of the heart stops?
What happens if the conductive system of the heart stops?
What is the function of the Purkinje fibers in the rhythmical and conductive system of the heart?
What is the function of the Purkinje fibers in the rhythmical and conductive system of the heart?
What is true about the pacemaker of the heart?
What is true about the pacemaker of the heart?
What is true about the intervals of time needed to pass different structures of conductive system?
What is true about the intervals of time needed to pass different structures of conductive system?
