Podcast
Questions and Answers
What is the first heart sound (S1) caused by?
What is the first heart sound (S1) caused by?
- Closure of the AV valves when ventricles contract at systole (correct)
- Rapid filling of the ventricles at middle one third of diastole
- Opening of the AV valves when ventricles relax at diastole
- Closure of the aortic and pulmonary valves
What is the term for the period of relaxation in the cardiac cycle?
What is the term for the period of relaxation in the cardiac cycle?
- Heart beat
- Diastole (correct)
- Cardiac cycle
- Systole
What happens to the semilunar valves during ventricular diastole?
What happens to the semilunar valves during ventricular diastole?
- They remain closed due to higher pressure in the large arteries (correct)
- They open to allow blood to enter the ventricles
- They start to contract to pump blood out of the ventricles
- They start to relax to allow blood to flow back into the atria
What is the primary function of the isovolumetric contraction phase?
What is the primary function of the isovolumetric contraction phase?
What happens to the intraventricular pressure during isovolumetric relaxation?
What happens to the intraventricular pressure during isovolumetric relaxation?
What is the maximum pressure in the left ventricle during systole?
What is the maximum pressure in the left ventricle during systole?
What happens to the pressure in the ventricular cavities during the isovolumetric contraction phase?
What happens to the pressure in the ventricular cavities during the isovolumetric contraction phase?
What is the second heart sound (S2) caused by?
What is the second heart sound (S2) caused by?
During what phase of the cardiac cycle is the third heart sound (S3) produced?
During what phase of the cardiac cycle is the third heart sound (S3) produced?
What is the duration of the cardiac cycle?
What is the duration of the cardiac cycle?
What is the minimum pressure required in the left ventricle to open the aortic valves?
What is the minimum pressure required in the left ventricle to open the aortic valves?
What is the pressure in the left ventricle at the end of rapid inflow?
What is the pressure in the left ventricle at the end of rapid inflow?
What happens to the AV valves during ventricular diastole?
What happens to the AV valves during ventricular diastole?
What is the fourth heart sound (S4) associated with?
What is the fourth heart sound (S4) associated with?
What happens to the semilunar valves during the isovolumetric contraction phase?
What happens to the semilunar valves during the isovolumetric contraction phase?
What is the minimum pressure in the right ventricle during diastole?
What is the minimum pressure in the right ventricle during diastole?
In what type of heart is the fourth heart sound (S4) commonly heard?
In what type of heart is the fourth heart sound (S4) commonly heard?
What characterizes the maximum ejection phase?
What characterizes the maximum ejection phase?
What is the pressure in the right ventricle at the end of rapid inflow?
What is the pressure in the right ventricle at the end of rapid inflow?
What is the term for the period of contraction in the cardiac cycle?
What is the term for the period of contraction in the cardiac cycle?
What type of sound is the first heart sound (S1) described as?
What type of sound is the first heart sound (S1) described as?
What is the maximum pressure in the pulmonary artery during systole?
What is the maximum pressure in the pulmonary artery during systole?
What happens to the blood in the aorta and pulmonary artery during the ventricular diastole phase?
What happens to the blood in the aorta and pulmonary artery during the ventricular diastole phase?
What happens during the reduced inflow phase of ventricular diastole?
What happens during the reduced inflow phase of ventricular diastole?
What is the duration of ventricular systole?
What is the duration of ventricular systole?
What marks the beginning of a new cardiac cycle?
What marks the beginning of a new cardiac cycle?
What is the primary function of the ventricular diastole phase?
What is the primary function of the ventricular diastole phase?
Why does the opening of a valve not produce a sound?
Why does the opening of a valve not produce a sound?
What is the term for the spontaneous generation of an action potential in the cardiac cycle?
What is the term for the spontaneous generation of an action potential in the cardiac cycle?
During which phase of the cardiac cycle do the AV valves close?
During which phase of the cardiac cycle do the AV valves close?
What is the purpose of the isovolumetric relaxation phase?
What is the purpose of the isovolumetric relaxation phase?
What happens to the intraventricular pressure during the reduced ejection phase?
What happens to the intraventricular pressure during the reduced ejection phase?
What happens during the isovolumetric contraction phase?
What happens during the isovolumetric contraction phase?
What marks the beginning of the cardiac cycle?
What marks the beginning of the cardiac cycle?
What is the duration of the cardiac cycle?
What is the duration of the cardiac cycle?
During which phase of the cardiac cycle is Heart Sound 2 produced?
During which phase of the cardiac cycle is Heart Sound 2 produced?
What is the sequence of heart sounds in the cardiac cycle?
What is the sequence of heart sounds in the cardiac cycle?
What is the duration of ventricular diastole?
What is the duration of ventricular diastole?
