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ALU 101 - Heart Exam Questions And 100% Correct Answers
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ALU 101 - Heart Exam Questions And 100%Correct Answers
Epicardium - Serous membrane on the surface of the myocardium
Myocardium - Heart muscle; forms the walls of the four chambers
Endocardium - Endothelium that lines the chambers and covers the valves; smooth to
prevent abnormal clotting
Right Atrium - Receives deoxyginated blood from the body via Superior and Inferior
Caval veins; atria produce ANP with increases urinary output and converts white fat to
brown fat
Tricuspid valve-Answer Correct AV valve; prevents backlflow from RV to the RA when
RV contracts
Right Ventricle-Answer Pumps blood to the lungs by way of pulmonary arteries
Pulmonary Semilunar Valve-Answer Prevents backflow of blood from pulmonary artery
to the RV when the RV relaxes
Left Atrium-Answer Receives oxygenated blood from the lungs by way of the four
pulmonary veins; produces ANP
Mitral Valve-Answer Left AV valve; prevents backflow of blood from the LV to the LA
when the LV contracts
, Left Ventricle-Answer Pumps blood to the body by way of the aorta
Aortic semilunar valve-Answer Prevents backflow of blood from the aorta to the LV
when the LV relaxes
Papillary muscles and chordae tendineae - Answer In both the RV and LV; prevent
inversion of the AV valves when the ventricles contract
Fibrous skeleton - Answer Fibrous connective tissue that anchors the four heart valves,
prevents enlargement of the valve openings, and electrically insulates ventricles from
the atria
Myocardial Infarction - Answer Necrosis of a cardiac muscle due to the complete
blockage of blood flow
Stenosis - Answer The narrowing of a valve
Electrocardiogram - Answer The recording of electronic changes generated by the
myocardium
Arrhythmia - Answer Irregular heartbeats caused by damage to part of the conduction
pathway or ectopic focus
Flutter - Answer A rapid but fairly regular heartbeat
Fibrillation - Answer Very rapid and uncoordinated contractions
Heart Rate (aspect and normal range) - Answer 60-80; created by the SA node through
the conduction pathway; parasympathetic impulses decrease rate; sympathetic
impulses increase rate
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