Cardiovascular System MCQ Quiz

Cardiovascular System MCQ Quiz

 Q.  Which layer of the heart or pericardium serves the dual purpose of lining the pericardium and forming the outermost wall of the heart? 

A. fibrous pericardium 

B. parietal pericardium 

C. visceral pericardium (epicardium) 

D. myocardium 

Answer- visceral pericardium (epicardium)

Q.  The layer of the heart that forms a smooth, protective lining of the heart chambers and valves is the _______________. 

A. endocardium 

B. myocardium 

C. epicardium 

D. parietal pericardium 

Answer- endocardium

Q.  The bicuspid valve __________________. 

A. is located on the left side of the heart 

B. guards the auricles of the heart 

C. guards the entrance to the aorta 

D. guards the entrance to the pulmonary trunk 

Answer- is located on the left side of the heart

Q.  The _____________ has the thickest wall because it pumps blood to the ________________. 

A. right atrium; systemic circuit 

B. right ventricle; lungs 

C. left atrium; lungs 

D. left ventricle; systemic circuit 

Answer- left ventricle; systemic circuit

Q.  Freshly oxygenated blood enters the heart through the ______________, and is pumped out the _____________. 

A. right atrium; aorta 

B. left atrium; aorta 

C. right ventricle; pulmonary arteries 

D. left ventricle; pulmonary arteries 

Answer- left atrium; aorta

Q.  Someone suffering a heart attack in his anterior lower right ventricle probably had a blockage in which coronary artery? 

A. anterior interventricular artery 

B. circumflex artery 

C. posterior interventricular artery 

D. marginal artery 

Answer- anterior interventricular artery

Q.  When do the A-V valves close during the cardiac cycle? 

A. when pressure inside the ventricles is at its lowest 

B. when pressure inside the atria is greater than that inside the ventricles 

C. when ventricular pressure exceeds that of the atria 

D. when pressure is greater in the aorta than in the left ventricle 

Answer- when ventricular pressure exceeds that of the atria

Q.  How does the impulse to contract slow down slightly before it is transferred into the ventricles? 

A. It makes a detour and travels to the brain and back. 

B. There is a parasympathetic brake on the AV node. 

C. Junctional fibers leading into the AV node have very small diameters. 

D. The skeleton of the heart prevents the impulse from being transmitted rapidly. 

Answer- Junctional fibers leading into the AV node have very small diameters.

Q.  What does the electrocardiogram (ECG) QRS wave indicate is happening in the heart? 

A. The atria are depolarizing. 

B. The ventricles are depolarizing while the atria repolarize. 

C. The ventricles are repolarizing. 

D. The heart is at rest. 

Answer- The ventricles are depolarizing while the atria repolarize.

Q.  Which artery supplies blood to the ilium and muscles of the lower back? 

A. aorta 

B. common iliac artery 

C. internal iliac artery 

D. iliolumbar artery 

Answer- iliolumbar artery

Q.  A deep wound to the upper thigh might damage the _____________ artery. 

A. femoral 

B. popliteal 

C. anterior tibial 

D. peroneal 

Answer- femoral

Q.  Blood is drained from the face, scalp, and superficial regions of the neck by the _______________. 

A. carotid arteries 

B. external jugular veins 

C. internal jugular veins 

D. brachiocephalic veins 

Answer- external jugular veins

Q.  A unique venous system, called the ________________, carries blood directly from the intestines to the liver for processing rather than directly into the inferior vena cava. 

A. hepatic portal system 

B. superior mesenteric vein 

C. saphenous vein 

D. gonadal vein 

Answer- hepatic portal system

Q.  The inability of the left ventricle to pump blood adequately to the body's cells is indicative of ________________. 

A. an embolus 

B. cardiac tamponade 

C. congestive heart failure 

D. asystole 

Answer- congestive heart failure

Q.  A condition in which there is a congenital predisposition for a ruptured aorta is _____________. 

A. a metabolic disorder of fatty acid metabolism 

B. Marfan syndrome 

C. Niemann-Pick type C disease 

D. Coronary artery disease 

Answer- Marfan syndrome

Q.  Which membrane is closest to the heart muscle? 

A. pericardial sac 

B. fibrous pericardium 

C. parietal pericardium 

D. visceral pericardium 

Answer- visceral pericardium

Q.  How many openings are there in the right atrium? 

A. 1 

B. 2 

C. 3 

D. 5 

Answer- 3

Q.  The _____ valve lies between the right atrium and right ventricle. 

A. bicuspid 

B. aortic semilunar 

C. pulmonary semilunar 

D. tricuspid 

Answer- tricuspid

Q.  The pulmonary semilunar valve prevents a back-flow of blood into the _____. 

A. pulmonary artery 

B. right ventricle 

C. left ventricle 

D. right atrium 

Answer- right ventricle

Q.  The aortic semilunar valve prevents blood from returning to the _____. 

A. left ventricle 

B. aorta 

C. right ventricle 

D. left atrium 

Answer- left ventricle

Q.  Which structure contains the lowest amount of oxygen? 

A. pulmonary vein 

B. aorta 

C. vena cava 

D. right ventricle 

Answer- vena cava

Q.  Cardiac output can be determined by the following formula: 

A. HR - SV 

B. HR divided by SV 

C. HR + SV 

D. HR x SV 

Answer- HR x SV

Q.  The first heart sound is caused by closure of the _____ valves. 

A. pulmonary semilunar 

B. atrioventricular 

C. aortic semilunar 

D. mitral 

Answer- atrioventricular

Q.  The last in the cardiac conduction sequence is the _____. 

A. SA node 

B. AV node 

C. AV bundle 

D. Purkinje fibers 

Answer- Purkinje fibers

Q.  The electrical initiation of a heartbeat begins in the _____ chamber wall. 

A. left ventricle 

B. right ventricle 

C. right atrium 

D. left atrium 

Answer- right atrium

Q.  The central cardiac control region is in the _____ of the brain. 

A. hypothalamus 

B. medulla oblongata 

C. cerebellum 

D. pons 

Answer- medulla oblongata

Q.  The T wave of an electrocardiogram represents which event? 

A. ventricular depolarization 

B. atrial repolarization 

C. ventricular repolarization 

D. atrial depolarization 

Answer- ventricular repolarization

Q.  A heartbeat of less than 60 beats per minute is called _____. 

A. tachycardia 

B. bradycardia 

C. arrhythmia 

D. fibrillation 

Answer- bradycardia

Q. Most of the average adult heart lies to the left of the midline. 



C. Nothing can be said 

D. None of the mentioned 

Answer- TRUE

Q. Pericardial fluid is serous and allows the heart to beat without friction in the pericardial sac. 



C. Nothing can be said 

D. None of the mentioned 

Answer- TRUE

Q. The right and left sides of the heart are separated by the interventricular septum. 



C. Nothing can be said 

D. None of the mentioned 

Answer- FALSE

Q. Blood in all veins is relatively low in oxygen. 



C. Nothing can be said 

D. None of the mentioned 

Answer- FALSE

Q. When an atrium is in systole the ventricle is in diastole. 



C. Nothing can be said 

D. None of the mentioned 

Answer- TRUE

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