IBHRE CEPS Anatomy and Physiology Questions and Correct Answers the Latest Update

Pericardium Protective sac surrounding heart Fibrous pericardium and Serous Pericardium Two layers of the pericardium Fibrous Pericardium Layer of pericardium, tough outer sheath, adheres to the sternum and diaphragm to stabilize heart Serous Pericardium Layer of pericardium, consisting of two fluid secreting layers (one lining the outer layer, the other the epicardium) Aortic and Pulmonary Two semilunar valves Coronary Sulcus #Examify | #OnlineExams | #TestPrep | #StudyResources | #AcademicSuccess | #ExamPreparation | #QuizTime | #LearningTools | #Education | #StudentSupport Examify | Smart Grades | Latest update Shallow groove that encircles heart, supports cardiac vessels, and separates heart chambers on surface Right coronary artery Consists of marginal artery and posterior descending artery - supplies RA, most of the RV, and diaphragm side of LV with blood Marginal artery Part of RCA that runs along AV groove from ostium in anterior aorta around RV Posterior descending artery Part of RCA that runs between RV and LV inferiorly LCA Consists of the left anterior descending artery and circumflex - supplies LA, LV, part of RV, most of interventricular septum with blood Left anterior descending artery Part of LCA that runs along the front of the heart Circumflex artery Part of LCA that runs between LA and LV #Examify | #OnlineExams | #TestPrep | #StudyResources | #AcademicSuccess | #ExamPreparation | #QuizTime | #LearningTools | #Education | #StudentSupport Examify | Smart Grades | Latest update Great cardiac vein, Middle cardiac vein, and posterolateral vein Largest cardiac veins Vein of Marshall Oblique vein of the LA, ends near the opening of the great cardiac vein Myocytes muscle cells in myocardium, initiate and conduct electrical impulses - branch and interlock, separated by discs - shorten when stimulated - each has nucleus and myofibrils Myofibriles Parallel strands of tissue, subdivided into sarcomeres Sarcomere Basic contractile unit of the heart - stimulated: release calcium from sarcoplasmic reticulum, actin and myosin slide over each other to shorten Apex Heart contraction is a wringing twisting motion of the myocardium that starts at the ___. #Examify | #OnlineExams | #TestPrep | #StudyResources | #AcademicSuccess | #ExamPreparation | #QuizTime | #LearningTools | #Education | #StudentSupport Examify | Smart Grades | Latest update K+ concentrated inside cell, Na+ and Ca++ outside cell, internal charge of cell is negative Cardiac cell at rest: internal charge, ion concentrations intracellular/extracellular -90mV Resting transmembrane potential of cardiac cell at rest -60mV, Na+ rushes into ce