which of the following occurs with the heart chambers when they contract? Pick two answers: volume goes up, pressure goes down, volume goes down, pressure goes up.

What does Sinus rhythm mean? Provide a definition.    Name each wave form and describe what is happening electrically in the heart at each point.

Which of the four chambers of the human heart has the thickest muscular wall?

What is occurring during ventricular ejection ? The AV valves are closed and the semilunar valves are open as blood is leaving the ventricles . The AV valves are open and the semilunar valves are closed as ventricular pressure is . increasing The AV valves are open and the semilunar valves are closed as blood is leaving the ventricles . The AV and semilunar valves are closed as ventricular pressure is increasing .

isovolumetric contraction isovolumetric relaxation ventricular filling ventricular ejection closed rises S1 drops depolarize S2 The first phase of the cardiac cycle is . This is when a lot of blood is in the atria, which causes atrial pressure to be higher than the ventricles. The atrioventricular valves open, and blood moves from the atria to the ventricles. At the end of this phase, the atria contract to maintain pressure and blood flow into the ventricles. As blood leaves the atria, the pressure in the atria As blood enters the ventricles, the pressure in the ventricles Towards the end of this phase, the pressure in the ventricles will exceed the pressure in the atria. At this point, the heart enters the second phase of the cardiac cycle: At this point, the AV valves shut, and we hear . The atria repolarize and the ventricles (due to the QRS complex of the ECG), causing ventricular contraction. Although contracting, it is not yet moving blood into the arteries. All 4 heart valves…

What is occurring in the heart when diastolic pressure is being measured 1. The heart Astoria are relaxing 2. the coronary artery is rekaxing 3. the heart ventricles are relaxing 4. the pulmonary vein is contracting

Detail S1 and S2 heart sounds. Include in your answer what valve closure and heart activity causes these sounds to occur. What is the Kentucky gallop?

What are parts C, D, E, and F of the heart?

Task 1. A man takes the medicine - the block of slow calcium channels nifedipine. How and why will change: a) the frequency of heart contraction; b) the force of heart contraction?

Roberto’s doctor orders several tests of his heart function, including “ejection fraction.” Briefly explain what an ejection fraction measures. (Include what a normal measurement would be.)