Bio 204 Purdue Exam 1 Study Guide Questions And Answers

Bio 204 Purdue Exam 1 Study Guide Questions And Answers After tissue repair is completed, factor XII catalyzes the formation of a plasma enzyme called kallikrein, that, in turn, converts an inactive plasminogen into _________, a fibrin-dissolving enzyme that breaks up the clot. - ANSWER Plasmin What is the function of fibrin? - ANSWER -Fibrin creates the framework of a blood clot Choose the correct statement regarding the function of platelets. - ANSWER They secrete procoagulants, or clotting factors, which promote blood clotting What is the first procoagulant that the extrinsic and intrinsic pathways have in common? - ANSWER -Factor 10 In healthy blood vessels, platelets do not adhere because the smooth endothelium is coated with ______________. - ANSWER -Prostacyclin Fibrinolysis Pathway - ANSWER - Diagram of the Heart - ANSWER - Coronary Sulcus - ANSWER - Blood Flow of Pulmonary Circuit - ANSWER -Right Atrium Tricuspid Valve Right Ventricle Pulmonary Trunk Pulmonary Arteries Lungs Pulmonary Veins Left Atrium Blood Flow of Systemic Circuit - ANSWER -Left AV valve Left Ventricle Aortic Valve Ascending Aorta Coronary Arteries Left Subclavian Artery Systemic Capillaries Systemic Veins Venae Cavae Right Atrium Pericardium - ANSWER - Cardiac muscle is not prone to fatigue because it makes little use of anaerobic fermentation or the oxygen debt mechanism. - ANSWER -True P wave - ANSWER -Atrial Depolarization R wave - ANSWER -The first positive deflection produced by ventricular depolarization. Q wave - ANSWER -initial negative deflection produced by ventricular depolarization T wave - ANSWER -ventricular repolarization S wave - ANSWER -Ventricular depolarization is completed Fenestrated Capillary - ANSWER - Passing of Blood - ANSWER -Conducting Arteries Distributing Arteries Resistance Arteries Arterioles Capillaries Post-Capillary Venules Muscular Venules Medium Veins Venous Sinuses Large Veins In the heart, an action potential originates in the __________. - ANSWER Sinuatrial Node Which of the following is the correct sequential path of an action potential in the heart? - ANSWER -Sinuatrial node Atrioventricular Node Atrioventricular Bundle Bundle Branches Subendocardial Conducting Network Which of the following is true concerning the heart's conduction system? - ANSWER -Action potentials pass slowly through the atrioventricular node In the ventricles, the action potential travels along the interventricular septum to the apex of the heart, where it then spreads superiorly along the ventricle walls. - ANSWER -True Action potentials are carried by the subendocardial conducting network (Purkinje fibers) from the bundle branches to the ventricular walls. - ANSWER -True Sinuatrial Node - ANSWER -pacemaker determines heart rate Atrioventricular Node - ANSWER -electrical gateway to the ventricles AV Bundle - ANSWER -Signals leave the AV node and descend along this structure toward the apex of the heart Purkinje Fibers - ANSWER -Distributes the electrical excitation to the ventricles Preload - ANSWER -The precontraction pressure in the heart as the volume of blood builds up. As exercise progresses, muscular activity __________ venous return. This increases the __________ on the right ventricle. - ANSWER -increases; preload The difference between the maximum and resting cardiac output is called __________. - ANSWER -Cardiac Reserve Which of the following is the correct formula for calculating cardiac output? - ANSWER -Heart Rate * Stroke Volume