chaPav 19 CIRCULATORY SYSTEM: HEART ASSIGNMENT As the blood moves away from the
ID: 3509853 • Letter: C
Question
chaPav 19 CIRCULATORY SYSTEM: HEART ASSIGNMENT As the blood moves away from the heart, what is the principle difference between the blood in the pulmonary trunk and the blood in the aorta? Detail the layers you would have to penetrate in order to perform open-heart surgery What causes the valves to open? To close? List the pathway of blood from the right atrium and back. Which ventricle receives more blood flow via coronary arteries, why? What is the purpose of the electrical junctions (gap junctions called desmosomes)? List the conduction system in order. What does it provide? List some of the similarities and differences of the action potentials of the SA node and the myocardium. Draw a picture that depicts the actions of the heart during a cardiac cycle When are the heart sounds heard, during what action? What occurs between isovolumetric contraction and isovolumetric relaxation. What is the net change of volume after one cardiac cycle? What are the chronotropic effects of proprioceptors, baroreceptors, and chemoreceptors? What is preload? Afterload? How is cardiac output affected by exercise?Explanation / Answer
1.The pulmonary artery carries deoxygenated blood to the lungs. The function of theaorta is to carry oxygenated blood throughout the body. The function of thepulmonary artery is to deliver blood to the lungs for oxygenation.
3.he left AV valve is called the mitral valve. When the ventricles relax, atrial pressure exceeds ventricular pressure, the AV valves are pushed open and blood flows into the ventricles. However, when the ventricles contract, ventricular pressure exceeds atrial pressure causing the AV valves to snap shut.
4.
. Blood from the body flows:
The blood picks up oxygen in the lungs, and then flows from the lungs:
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