Interactive Physiology 2.0 Cardiovascular System: Cardiac Cycle 1. Which wave of
ID: 3524268 • Letter: I
Question
Interactive Physiology 2.0 Cardiovascular System: Cardiac Cycle 1. Which wave of the electrocardiogram (ECG) precedes isovolumetric relaxation? 2. During which phase is there a decrease in the volume of the ventricles? During which phase of the cardiac cycle is the pressure in the left ventricle higher than the pressure in the aorta? 3. 4. The phase of the cardiac cycle where the ventricles are in systole but there is no change in ventricular volume is called 5. Closure of the atrioventricular valves marks the beginning of which phase of the cardiac cycle? Name the phase when the atrioventricular valves and the semilunar valves are all closed during ventricular diastole. What pressure condition must be met for the mitral valve to open?Explanation / Answer
1) T wave of the electrocardiogram precedes isovolumetric relaxation.
The T wave represents ventricular repolarization. It occurs by ventricular relaxation, during this time pressure falls in the ventricles. The T wave of the ECG precedes ventricular repolarization and ventricular relaxation of muscles.
2) During ventricular ejection is there a decrease in the volume of the ventricles.
Ventricular ejection involves the S and T waves. During this time, pressure in the ventricles exceeds the pressure within the pulmonary arteries and aorta, the pulmonic valves open and permit to flow of blood.
3) During ventricular ejection phase of the cardiac cycle is the pressure in the left ventricle higher than the pressure in the aorta.
Ventricular ejection is the measurement of how amount of blood is being pumped out of the left ventricle of the heart with each contraction.
4) Isovolumetric contraction.
Isovolumetric contraction is the phase of the cardiac cycle. It occurs where the ventricles are in systole but there is no change in ventricular volume.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.