Question

The Heart 185 oventricular valve on the same side of the heart as the origin of the aorta is the a. aortic semilunar. c. mitral. b. tricuspid. d. pulmonary semilunar. 10. During atrial systole, all the following occur except a. deoxygenated blood passes into the right ventricle. b. oxygenated blood passes into the left ventricle. c. the ventricles are in diastole. d. the semilunar valves are open. 11. A major difference between atria and ventricles of the heart is that the former have a. a layer of myocardium. b. thinner walls. e. papillary muscles. d. a lining of endocardium. 12. An operation that attempts to repair an atrial septal defect would be carried out on the a. ductus arteriosus. b. ductus venosus. c. foramen ovale. d. interventricular septum. 13. A congenital heart disorder that results in cyanosis as a result of the mixing of oxygenated and deoxygenated blood is a. patent ductus arteriosus. b. atrial septal defect. c. ventricular septal defect. d. valvular stenosis. 14. A myocardial infarction results in a. the death of an area of the aorta. b. an accelerated rate of hemopoiesis. c. rapid cell division of the layers of the pericardium. d. death of an area of the heart muscle. 15. A "blue baby" is probably a. suffering from rheumatic heart disease. b. suffering from arterial sclerosis. c. not getting enough oxygenated blood throughout the body. d. not getting enough liver in the body. 16. A pulse rate of 100 times per minute indicates a. bradycardia. c. tachycardia. b. myocardia. d. endocardia. 17. The blood flows from the lungs into the heart's a. right atrium. b. left ventricle. c. atrioventricular valve. d. left atrium

Answer 1

Answer:

9) C) Mitral valve

Explanation: aorta is present on the left side of the heart. The atrioventricular valve present between left atrium and left ventricle is the bicuspid ( Mitral ) valve .

10) D) the semilunar valves are open

explanation: During atrial systole, ventricles are i the diastole. In ventricular diastole, Semilunar valves are closed whereas atrioventricular valves are open allowing the blood to enter the ventricles from atria.

11) papillary muscles

explanation: Papillary muscles are present in the ventricles only.

12) C) foramen ovale

Explanation: Foramen ovale is present in the intertrial septal wall which is the location of atrial septal defect.