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m6 Cardio
| Question | Answer |
|---|---|
| Diastole | phase of a cardiac cycle when a heart chamber wall relaxes |
| cardiac output | amount of bllood per minute pumped by the heart |
| Endocardium | inner lining of heart chambers |
| Epicardium | outside of pericardium. on surface of heart |
| ischemia | deficiency of blood to a body part. |
| mitral valve(bicuspid) | between left atrium and left ventricle. |
| myocardium | heart muscle tissue |
| systole | phase of cardiac cycle when a heart chamber wall contracts. |
| Epicardium | outer layer of the heart that reduces friction from surrounding organs |
| Endocardium | covers heart valves and lines heart chambers. |
| Cardiac Veins | parallel to coronary arteries. Drain into coronary sinus. Empties into right atrium. Located on posterior side of heart. |
| 3 layers of heart blood vessels | tunica intima(endothelium), Tunica media, and tunica externa |
| Tunica media | middle layer of heart blood vessel. Thickest layer in arteries. |
| Tunica externa | Outer layer of heart blood vessel. This is the thickest layer in a vein. |
| Portal circulation | carries blood drained from the stomach, intestines, and spleen to the liver. |
| P-Wave | atria depolarization. Sa-nod spreads impulse |
| QRS Complex | ventricular depolarization. Atria repolarization. |
| T-Wave | Ventricular repolarization. |
| Parasympathetic nerve impulses(in relation to heart rate) | causes heart rate to slow down. |
| sympathetic nerve impulses(in relation to heart rate) | causes heart rate to speed up. |
| High levels of serum potassium(K+)(in relation to cardiac cycle) | causes the heart to be excitable |
| Calcium(Ca2+) (in relation to cardiac cycle) | important to cardiac muscle contraction. If too much is present, prolonged contractions. Too little, heart becomes weak. |
| First heart sound(s1 or LUB) | Caused by the closure of the atrioventrical valves. |
| Second heart sound(s2 or DUB) | caused by the closure of the semilunar valves |