NU 327 Exam 3 Questions with Detailed Verified Answers

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NU 327 Exam 3 Questions with
Detailed Verified Answers


Question: What is the main goal of the circulatory system?


Ans: transport oxygen and nutrients and the removal of metabolic waste
products within the body


Question: Where does the right ventricle pump blood to?


Ans: the lungs


Question: Where does the left ventricle pump blood to?


Ans: systemically


Question: Systemic circulation


Ans: Left ventricle to aortic valve pumps oxygenated blood into the aorta,
smaller arteries and arterioles, goes to the venules and veins and is
deoxygenated blood to right atrium, tricuspid valve, right ventricle to
pulmonary valve


Question: How many liters of blood goes through the circuit each minute?


Ans: 5

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Question: What is the principle tissue of the aorta, arteries and arterioles?


Ans: smooth muscle


Question: What are the capillaries made up of?


Ans: single layer of endothelial cells


Question: What is the principle tissue of the venules, veins and superior vena
cava?


Ans: connective tissue


Question: What do the lymphatics do?


Ans: -vessels begin blindly(not in a circuit)


-reabsorbs fluid that leaks out of vascular space (lymph)


Question: What is the intima?


Ans: -layer of endothelial cells


-direct contact with blood


-want it to be smooth, larger than the artery


-valves keep the flow going in one direction and do not let it back flow


Question: What is the media?

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Ans: -middle layer


-smooth muscle and elastin


-thicker in arteries


Question: What is the adventitia?


Ans: -outer layer


-supportive connective tissue


Question: What is extrinsic blood flow?


Ans: -vasoconstriction


-sympathetic nervous system


-norepinephrine


Question: What is intrinsic blood flow?


Ans: -autoregulation


-maintaining a constant flow regardless of changes in arterial pressure


Question: What should the mean arterial pressure be and what is the
formula?

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Ans: -at least 60


-Diastolic BP times 2 + Systolic and divide by 3


Question: What are blood clots composed of?


Ans: -aggregated platelets


-clotting factors


-fibrin


Question: Where do blood clots form?


Ans: -chambers of the heart


-arterial or venous peripheral circulatory systems


Question: What do arterial blood clots do?


Ans: -may reduce flow (turbulence)


-distal ischemia


Question: What do venous blood clots do?