DATA ANALYSIS 1. What electrical and mechanical events correlate to the P wave? The QRS complex? The T wave? 2. During which ECG interval does filling of the ventricles occur? During which ECG interval does ejection occur? What is systole and diastole? 3. Describe the path an action potential travels during one cardiac cycle. 4. Describe the flow of blood through the heart and the subsequent flow through the body. 5. What changes occurred in heart rate as position changes from lying down to sitting up? Describe the physiological mechanisms causing these changes. 6. What percentage of the resting cardiac cycle is systole and what percentage is diastole? How did this percentage change with exercise? Explain.

Heart 10 During diastole, a. ventricular pressure increases rapidly b. pulmonary and aortic valves are open C. atrioventricular valves are closed d. atria and ventricles fill with blood O O O

4.    This is not and will not be graded

O Cardio_Phys 6 Unanswered Which of the following channels are involved in the action potential in contractile cells of the heart? A Na+ leak channels voltage-gated Na+ channels C voltage-gated Ca+2 channels D all of the above E B and C only

What is each of these physiology topics? And what does each do? 1. Stroke Volume 2. End Systolic Volume 3. Details of an ECG ( electrocardiogram) 4. Events in Myocardial action potential

1. You should be able to distinguish two heart sounds.  The first sound is when the ventricle begins contracting (ventricular systole) the atrioventricular valves snap shut.  This closing produces a low-pitched sound, the "lub" sound. The atrioventricular valves close when the ventricles contract due to pressure coming from the blood in the: Group of answer choices veins ventricles arteries atria   2.  The "lub" sound is accompanied by the pulmonary and aortic (semilunar) valves opening. This, too, happens when the ventricles contract. These valves open due to pressure of the blood coming from the: Group of answer choices atria ventricles arteries veins   3. The second sound you hear in the heartbeat is when the ventricles begin to relax (diastole). The closing of the pulmonary and aortic (semilunar) valves produces a sound, the "dub" sound. These valves close when the ventricles relax due to the pressure of the blood coming from the: Group of answer choices atria…

2. How is an action potential in a contractile cardiac cell different from action potential in a pacemaker cell? (Write the phases and the channels involved for each phase).

Pls answer all parts of the question

Having trouble interpretting this

Regarding a sheeps heart: