The Chordae tendinae: a. contract the papillary muscles b. open the semilunar va
ID: 88848 • Letter: T
Question
The Chordae tendinae: a. contract the papillary muscles b. open the semilunar valves c. close the atrioventricular valves. d. prevent the atrioventricular valve flaps from being pushed backwards by the blood. Which of the following depolarizes next after the AV node? a. Bundle of His b. Atrial myocardium c. Purkinje fibers d. Ventricular myocardium The left ventricle has a thicker myocardium than the right ventricle in order to: a. Pump a greater volume of blood b. Pump blood through a smaller blood vessel c. Accommodate a greater volume of blood d. Pump blood with greater pressure e. Get the blood to the lungs in sufficient time for oxygenationExplanation / Answer
4. The function of the chordae tendineae is to limit the freedom of motion of the cusps of the AV valves (tricuspid and mitral), thus limiting their capacity to "flap" back into the corresponding atrium.Hence d is the correct answer
5.Bundle of his depolarizes next after AV node Hence answer is a
6. the left ventricle has thicker myocardium than the right because it needs to pump blood to most of the body while the right ventricle fills only the lungs.It must create a lot of pressure for the same . Hence correct answer is d.