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BMD 252 (A&P II) EXAM 3 STUDY GUIDE 19 RAVINE QUESTIONS WITH VERIFIED ANSWERS

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BMD 252 (A&P II) EXAM 3 STUDY GUIDE 19 RAVINE QUESTIONS WITH VERIFIED ANSWERS

Institution
BMD 252
Course
BMD 252

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BMD 252 (A&P II) EXAM 3 STUDY
GUIDE 19 RAVINE QUESTIONS WITH
VERIFIED ANSWERS
What is perfusion? - ANSWERS-
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the passage of a fluid through an organ or tissue through a closed system of vess
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els

What is closed circulation? - ANSWERS-
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In this type of system, blood is pumped by a heart through vessels, and does not
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normally fill body cavities. v5 v5 v5




What is the functional basis of arteries? - ANSWERS-
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To carry blood away from heart
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What is the functional basis of veins? - ANSWERS-To carry blood towards heart
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What is functional basis of capillaries? - ANSWERS-
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It is the vessels for gas, nutrients, & waste exchange
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What is the origins/destination of plasma fluid? - ANSWERS-
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proximal capillaries becoming interstitial fluid
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What is the origins/destination of interstitial fluid? - ANSWERS-
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enters lymphatic capillaries, becomes lymph
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What is the origins/destination of lymph fluid? - ANSWERS-
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returns lymph fluid to blood circulation near heart
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What is the tunica intima (endothelial layer)? - ANSWERS-
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single layer of flattened endothelium* lining lumen of all blood vessels
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What is the tunica intima (subendothelial layer)? - ANSWERS-
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basement membrane + loose connective tissue supporting lumen endothelium
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What is the lumen? - ANSWERS-
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central opening in all blood vessels, determines internal diameter (ID) + perfusion r
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ate

What define lumens? - ANSWERS-the endothelium & associated vessel wall
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What are the structural features of all 3 vessel tunics? - ANSWERS-
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tunica intima (inner or luminal layer), tunica media (middle layer), and tunica adven
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titia (outer layer)
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, What are the functional features of all 3 vessel tunics? - ANSWERS-
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Transfer blood to and from the heart v5 v5 v5 v5 v5 v5




What are the effects of smooth muscle contraction on blood vessel diameter? -
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ANSWERS-regulates the size of the blood vessel lumen
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What is the function of the vasa vasorum? - ANSWERS-
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it is a tiny system of external blood vessels found in larger veins/arteries
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What does the vasa vasorum do? - ANSWERS-
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"feeds" outer vessel layers while lumen blood nourishes internal layers
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Correctly order vessel tunic layers starting from lumen space. - ANSWERS-
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Tunica intima, Tunica media, Tunica externa (tunica adventitia).
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Correctly order the route of different types of blood vessels starting at the heart an
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d returning blood to the heart. - ANSWERS-
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heart, elastic arteries (largest), muscular arteries (large), arterioles (small), capillari
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es (smallest), venules (small), veins (larger), vena cavae (largest), heart
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structure of elastic (conducting) arteries - ANSWERS-- large ID w/ thick-
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walls, size ranges from 1-2.5 cm
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function of elastic (conducting) arteries - ANSWERS-
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primary role is to conduct blood from heart to medium-size arteries
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structure of muscular (distributing) arteries - ANSWERS-
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distal to elastic arteries, proximal to arterioles, size ranges from 0.1-10 mm
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function of muscular (distributing) arteries - ANSWERS-
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primary role is to deliver blood to body organs
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structure of arterioles - ANSWERS- v5 v5 v5 v5


smallest arteries interfacing with tissue capillary beds, size ranges from 10 mm up
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to 0.3 mm
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function of arterioles - ANSWERS- v5 v5 v5 v5


primary role is to deliver blood to each area inside an internal organ
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structure of capillaries - ANSWERS- v5 v5 v5 v5


microscopic blood vessels present in most body tissues, avg. length = 1mm w/ an
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ID = 8-10 μm
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function of capillaries - ANSWERS- v5 v5 v5 v5


timely exchange of materials (respiratory gases, nutrients, hormones) between bloo
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d plasma & interstitial fluid
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What are pericytes? - ANSWERS-mesenchymal-
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like cells located on outer endothelium surface to help stabilize capillary walls
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