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1) The main diffcrencc between an artery and a vein is a. b. c. d. e. Arteries a

ID: 3507227 • Letter: 1

Question

1) The main diffcrencc between an artery and a vein is a. b. c. d. e. Arteries always have oxygenated blood while veins don't Arteries have 3 layers and veins have 2 Arteries are the place for gas exchange while veins only conduct Arteries go away from the heart and veins go towards the heart Arteries are superficial and veins run deep in our skin 2) Which of the following is NOT a characteristic of atria or ventricles a. Atria are thinner b. Ventricles have a bigger layer of muscle c. Atria receives blood d. Ventricles push away blood e. Atria pushes blood out to the body 3) Which of the following is NOT a function of the fibroskeleton surrounding the openings to major arteries and chambers a. b. c. d. e. Provides a site of attachment for the AV valves Maintains the shape of the heart during contraction Prevents the apex and base to be pulled together It insulates the atria from the ventricles All of them are correct 4) What is mitral valve stenosis a. Is a widening of the opening of the bicuspid valve b. Is a widening of the opening of the tricuspic valve c. Is a narrowing of the opening of the bicuspid valve d. Is a narrowing of the opening of the tricuspid valve e. Is the formation of "scar"tissue in the mitral valve 5) Failure to opening of the pulmonary semilunar valve is due to a. b. c. d. e. A weak atrial systole A weak ventricular systole first phase A weak ventricular systole second phase A weak ventricular diastole early phase A weak ventricular diastole late phase 6) What is the percentage of autorythmic myocardiocytes in a normal heart a. b. C. 1% 10% 5% E. 50/

Explanation / Answer

1. The main difference between arteries and veins is that arteries carry oxygenated blood and veins carry deoxygenated blood.

So the answer is (a)

2. Left ventricle pushes the oxygenated blood out of the heart to the body.

So the answer is (e)

3. The fibrous skeleton of heart provides mechanical support toheart, maintain structure of heart and separates atria and ventricles

So the answer is (e)

4. Mitral valve have two flaps and thus also known as bicuspid valve. Mitral valve stenosis is a condition where mitral valve narrowing occurs. This results in blocking of blood flow to left ventricle.

So the answer is (c)

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