NUR 219 EXAM 3 STUDY AND PASS SOLUTIONS 100% A+.

NUR 219 EXAM 3 STUDY AND PASS v v v v v v




SOLUTIONS 100% A+
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1. Deliver oxygen, nutrients, hormones and electrolytes to the cells
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2. Remove CO2 and metabolic waste products of cellular metabolism - CORRECT ANSWER✔✔primary
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functions fo the circulatory system (2)
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differences, greater - CORRECT ANSWER✔✔Blood flow depends on the ____________ between pressures
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in the arterial and venous vessels supplying the organ.
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Blood flows because the forces that drive flow are ___________ than resistance to flow.
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resistance - CORRECT ANSWER✔✔opposition to force =
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percentage of RBC, viscous - CORRECT ANSWER✔✔viscosity of blood is ________________
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If Hemacrit is elevated blood is more _____________
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velocity - CORRECT ANSWER✔✔distance blood travels in a unit of time
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decreases - CORRECT ANSWER✔✔Velocity _____________ as blood moves from the aorta to the capillaries
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vascular compliance - CORRECT ANSWER✔✔volume the vessel can accommodate for a given increase in
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pressure.
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,2.4 oz - CORRECT ANSWER✔✔the average heart pumps ______________ of blood per heartbeat.
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Right heart - CORRECT ANSWER✔✔-thin walled ventricle
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-low pressure pump (PAP 25/10)
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-receives blood from the systemic circulation
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-pumps blood to lungs (Pulmonary Circulation)
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Left heart - CORRECT ANSWER✔✔-ventricular muscle s thick
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-high pressure pump (aortic pressure= 120/80)
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-receives blood from lungs v v v




-pumps to systemic circulation v v v




pericardium - CORRECT ANSWER✔✔part of the heart wall v v v v v v v




-prevents displacement of the heart with movement v v v v v v




-acts as a physical barrier
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v-protects against infection and inflammation v v v v




-contains pain receptors v v




v-elicits changes in BP and heart rate
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myocardium - CORRECT ANSWER✔✔part of the heart wall v v v v v v v




-thickest layer v




-composed of cardiac muscle v v v




endocardium - CORRECT ANSWER✔✔part of the heart wall v v v v v v v

,-internal lining of myocardium v v v




-connects with arteries, capillaries and veins to create a continuous closed system
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pulmonary vein - CORRECT ANSWER✔✔Which is the only vein in the body that carries oxygenated blood?
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pulmonary artery - CORRECT ANSWER✔✔Which is the only artery in the body that carries deoxygenated
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blood?
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Vena Cava (deoxygenated blood), right atrium, right ventricle, pulmonary artery, pulmonary capillary bed,
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pulmonary vein, left atrium, left ventricle, aorta (oxygenated blood) - CORRECT ANSWER✔✔Blood flow
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through a single cardiac cycle (start at vena cava)
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diastole, systole - CORRECT ANSWER✔✔Coronary blood flow is higher during ___________ than during
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_________________.
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left - CORRECT ANSWER✔✔____________ Coronary Artery
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-_________ Anterior Descending v v




v -supplies left and right ventricles
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-Circumflex artery v




v -supplies left atrium and lateral wall of left ventricle
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right - CORRECT ANSWER✔✔_________ Coronary Artery
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- Conus
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v -Supplies upper right ventricle v v v




-__________ Marginal Branch v v




v -Supplies right ventricle v v




- Posterior Descending
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, v -supplies smaller branches of both ventricles
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Collateral Circulation - CORRECT ANSWER✔✔Normally some arterial anastomoses (connections) exist
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within the coronary circulation.
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When occlusion occurs slowly over a long period of time, there is a greater change of adequate
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_______________ ____________ developing.
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glucose, fatty acids, lactate - CORRECT ANSWER✔✔Myocardial cardiac muscle depends on constant
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production of ATP for energy. What are it's three sources of ATP?
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-muscle contraction and relaxation
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-electrical excitation - CORRECT ANSWER✔✔Energy produced for myocardial cardiac muscle is used for (2)
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cardiac output - CORRECT ANSWER✔✔Volume of blood flowing through systemic or pulmonary circuit
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expressed in liters per minute
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5 - CORRECT ANSWER✔✔Normal cardiac output is ______L/min for the resting adult
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preload, afterload, myocardial contractility, heart rate - CORRECT ANSWER✔✔4 factors determining
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cardiac output
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stroke volume - CORRECT ANSWER✔✔Amount of blood ejected by the ventricle with each contraction.
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-calculated bu subtracting the volume of blood in the ventricle at the end of contraction (end-systolic
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volume) from the volume of blood just prior tot he contraction (end-diastolic volume)
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-applies equally to both left and right ventricles
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-important determinant of cardiac output v v v v




-correlates with cardiac function v v v