HLTH 107 Quiz 1Complete Exam With Accurate Answers

heart anatomy - Correct Answers Four chambered, muscular, hollow cone-shaped muscular organ approximately the size of a closed fist heart location - Correct Answers Located in the mediastinum and suspended by the great vessels, with 2/3 of the mass of the heart is to the left of the midline Top portion of the heart - Correct Answers base Bottom portion of the heart ( blunt point ) - Correct Answers apex heart function - Correct Answers pump blood throughout body. left and right chambers are separated by - Correct Answers the septum heart is made up of - Correct Answers several layers outermost layer of heart ; in contact with pericardium - Correct Answers epicardium thick middle layer of heart contains muscle mass muscle mass less on the right than the left side - Correct Answers myocardium innermost layer of the heart lines the chamber - Correct Answers endocardium thick muscular protective sac enclosing the heart made up of two membranes - Correct Answers pericardium contains pericardial fluid may fill with blood if heart is injured - Correct Answersvisceral and parietal pericardium superior and inferior vena cava - Correct Answersvena cava carries oxygen poor blood from right ventricle to the lungs - Correct Answerspulmonary artery returns oxygen rich blood to the left atrium from the lungs - Correct Answerspulmonary vein carries oxygen rich blood from the left ventricle to the body - Correct Answersaorta separate the atria and the ventricles - Correct AnswersAtrioventricular (AV) valves separates right atrium and ventricle - Correct Answerstricuspid valve separates the left atrium and ventricle - Correct Answersthe mitral (bicuspid) valve separate the ventricles and the arteries they empty into - Correct Answerssemilunar valves separates the right ventricle and the pulmonary artery - Correct Answerspulmonic valve separates the left ventricle and aorta - Correct Answersaortic valve blood vessels that carry blood away from the heart to the body. - Correct Answersarteries transport blood from the body back to the heart. - Correct Answersveins Arteries decrease in size as they move away from the heart, branching into many small - Correct Answersarterioles microscopic thin-walled vessels through which oxygen, carbon dioxide, and other nutrients and waste products are exchanged. - Correct Answerscapillaries Groups of capillaries gradually enlarge to form - Correct Answersvenules about 55% of whole blood clear to pale-yellow liquid that acts to hold the blood cells in suspension - Correct Answersplasma bout 45% of whole blood consist of red blood cells, white blood cells, and platelets - Correct Answersformed elements plays a role in myocardial depolarization (sodium-potassium pump) - Correct AnswersSodium Na+ has role in myocardial depolarization and contraction - Correct AnswersCalcium Ca++ plays role in repolarization - Correct AnswersPotassium K+ work in opposition to one another to regulate the heart - Correct AnswersThe sympathetic and parasympathetic nervous systems dominant in stressful situations - Correct AnswersSympathetic nervous system dominant during sleep - Correct AnswersParasympathetic nervous system superior vena cava - Correct Answers aortic semilunar valve - Correct Answers pulmonary semilunar valve - Correct Answers right atrium - Correct Answers tricuspid valve - Correct Answers papillary muscles - Correct Answers inferior vena cava - Correct Answers right ventricle - Correct Answers left ventricle - Correct Answers bicuspid valve - Correct Answers left atrium - Correct Answers pulmonary veins - Correct Answers pulmonary trunk - Correct Answers left pulmonary arteries - Correct Answers aorta - Correct Answers