50. Rhythm that originates in the ventricles, which may produce a pulse. A. Asystole OB. Agonal rhythm OC. Ventricular tachycardia D. Ventricular fibrillation
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- 5. SHEEP HEART DISSECTION a. Explain the difference in size and wall thickness of the ventricles. b. Describe the function of the chordae tendineae. c. Circle the terms that describe the chordae tendineae. elastic nonelastic thick thin pliable stiff opaque transparent d. Circle the terms that apply to the semilunar valves. elastic nonelastic thick thin pliable stiff opaque transparent e. Circle the terms that apply to the atrioventricular valves. elastic nonelastic thick thin pliable stiff opaque transparentWhich of the following is/are involved in regulating blood pressure? a. heart b. baroreceptors c. cardiovascular center in medulla oblongata d. all of the aboveAll of the following are true of the anatomy of the heart except A. The epicardium has a serous membrane with a thin layer of fluid B. The myocardium is also known as the cardiac muscle C. The pericardium is primitive and will degenerate D. The endocardium also forms the heart valves Choose the correct answer
- cardiac output will increase by a. decreased blood volume and decrease of heart contractility b. decreased heart rate and contractility c. increased venous return and increased heart contractility d. decreased peripheral resistance and decreased venous returnCardiac output measures blood ejected from a. both atria each minute b. each ventricle each minute c. both ventricles each minute d. each atrium each minute e. each atrium each beatThe only area of the heart that receives innervation from the brain is called the: A. Atrioventricular bundle B. Atrioventricular node C. Sinoatrial node D. Interatrial Fiber
- In a patient with _______ some of the oxygenated blood returning to the left atrium would be pumped to the lungs a second time rather than going directly into systemic circulation. A a hole in the ventricular septum B sclerotic aortic semilunar valve that failed to fully open C an insufficient bicuscpid valve that failed to fully close34. An arrhythmia originating in an escape pacemaker in the AV junction with a rate of 40 to 60 beats per minute is called a(n): A. Agonal intythm OB. Junctional bradycardia C. Junctional escape rhythm O D. Complete AV block16. Chordae tendineae depart from the heart valves to the papillary muscles in the __ A. atrium B. ventricles C. auricles D. aorta
- 20. In a non-innervated heart Preload will increase: A. Peripheral resistance. B. Aortic compliance. C. Stroke volume. D. All of the above. E. None of the above.Which primitive area of the heart will give rise to theright ventricle?a. bulbus cordisb. primitive ventriclec. sinus venosusd. truncus arteriosus1. In ventricular fibrillation, there is no pattern visible in the EKG. What does this mean in terms of contraction? A. contraction will have no visible pattern either and the ventricles will be unable to eject much blood B. the pattern doesn't matter; contraction of the ventricles will not be affected as long as ventricular myocytes continue to depolarize and depolarize C. the ventricular myocytes will be unable to contract C. contraction will become constant and ventricles will be unable to fill with blood 2. Which structure follows depolarization of the SA Node and atria in the cardiac conduction system? A.ventricular myocytes B.AV Node C.left and right bundle branches D.AV bundle E Purkinje fibers 3. Hypertension increases afterload for the heart which in turn A. increases Stroke Volume B. decreases Stroke Volume C.increases Cardiac Output D.increases Venous Return