WGU D313 UPDATED ACTUAL Exam Questions and CORRECT Answers

WGU D313 UPDATED ACTUAL Exam
Questions and CORRECT Answers
Myocardium - CORRECT ANSWER - muscular, middle layer of the heart.
Contains cardiac muscle fibers


Where is the base of the heart located? - CORRECT ANSWER - At the third costal cartilage



Where is the apex of the heart located? - CORRECT ANSWER - 5th intercostal space,
midclavicular line


Layers of the heart from outer to inner

(Heart only) - CORRECT ANSWER - Epicardium
Myocardium
Endocardium


Layers of the heart from outer to inner (six layers) - CORRECT ANSWER - Fiberous
pericardium
Parietal layer of serious pericardium
Pericardial cavity
Epicardium
Myocardium
Endocardium


function of pericardium - CORRECT ANSWER - protects the heart and retains its position in
the mediastinum

,Serosal pericardium - CORRECT ANSWER - Closed sac composed of two thin layers
(visceral and parietal) with a narrow cavity (pericardial cavity) between them filled with
pericardial fluid.


Function of the serosal pericardium - CORRECT ANSWER - Reduces friction as the heart
beats


What layer of the heart covers the heart valves? - CORRECT ANSWER - endocardium



Pericardium - CORRECT ANSWER - A thin, fluid filled sac that covers the outer surface of
the heart


pericardial cavity - CORRECT ANSWER - A narrow cavity filled with pericardial fluid



Pericardial fluid - CORRECT ANSWER - Thin serous fluid found in the pericardial cavity



Pathway of blood through the heart - CORRECT ANSWER - Right atrium,
tricuspid valve,
right ventricle,
pulmonary semilunar valve,
pulmonary trunk,
pulmonary arteries,
lungs,
pulmonary veins,
left atrium,
bicuspid (mitral) valve,
left ventricle,
aortic semilunar valve

,Venules - CORRECT ANSWER - small vessels that gather blood from the capillaries into the
veins


Blood goes from the inferior and superior vena cava to... - CORRECT ANSWER - Right
atrium


Valve after right atrium - CORRECT ANSWER - Tricuspid valve
Right AV valve


Tricuspid valve leads to - CORRECT ANSWER - right ventricle



What valve does the right ventricle send blood through? - CORRECT ANSWER - Pulmonary
valve


Pulmonary vein leads to the - CORRECT ANSWER - left atrium



Blood goes from the left atrium through what valve? - CORRECT ANSWER - Mitral valve
Left AV valve


Mitral valve leads to what chamber - CORRECT ANSWER - Left ventricle



Blood exits, the left ventricle through what valve? - CORRECT ANSWER - Aortic valve



Three main types of arteries - CORRECT ANSWER - 1. Elastic arteries (conducting arteries)
2. Muscular arteries (distributing arteries)
3. Arterioles (resistance vessels)


layers of arteries and veins - CORRECT ANSWER - tunica interna,

, tunica media,
tunica externa


layers of arterioles and venules - CORRECT ANSWER - Tunica interns,
Tunica media
Tunica externa


Function of elastic arteries - CORRECT ANSWER - stretch when blood is forced out of the
heart, and recoil under low pressure


layers of capillaries - CORRECT ANSWER - only tunica intima



Muscular arteries (distributing arteries) - CORRECT ANSWER - lack elastic fibers in the
walls.


Smooth muscles maintain, sustained pressure.


Well-defined walls


Repeatedly branch until they reach their target organ


Arterioles (resistance vessels) - CORRECT ANSWER - Thin, porous, microscopic arteries
that feed blood to the capillaries


Terminal end of atrerioles - CORRECT ANSWER - Metarteriole



What regulates blood flow in arterioles - CORRECT ANSWER - Sympathetic nerves
Localized, chemical mediators