AHN 447 Exam #1 || with Accurate Answers 100%.

What is the purpose of coronary circulation? correct answers To supply blood/nutrients to the heart Coronary Circulation: The left anterior descending (LAD) supplies... correct answers anterior wall of LV, septum, papillary muscles, chordae Coronary Circulation: The left circumflex artery supplies... correct answers lateral wall LV, SA node, AV node Coronary Circulation: The right coronary artery supplies... correct answers RA, RV, inferior wall of LV Coronary blood flow to the heart muscle occurs during _____. Adequate flow requires MAP of at least.... correct answers diastole 60 mmHg ________________: The amount of blood from the left ventricle in one squeeze correct answers stroke volume Stroke volume changes based on the.... (3 things) correct answers preload, afterload, contractility __________: The amount of blood ejected from the LV over one minute. correct answers cardiac output What does the vagus nerve do? correct answers tells the heart rate to go down 3 main functions of the vascular system? correct answers Provide conduits for blood flow to and from the heart Carry cellular waste products to excretory organs Lymphatic flow to drain tissue fluid back into the general circulation What happens to the heart as we age? correct answers Valves thicken and stiffen SA node decreases in mass/function Decrease in myocardial contractility- the squeeze is not as strong