Multiple Choice Questions

The first sounds of a cardiac cycle occurs when the
  • AV valves are closing
  • pulmonary and aortic valves are closing
  • L. pulmonary trunk
  • AV bundle
Compare the structure of the tricuspid valve with that of the pulmonary valve.
  • The right ventricle is smaller/thinner as it only has to pump blood through the lungs and back to the right side of the heart.The left side is much thicker/stronger/larger as it has to get the blood to go throughout the whole body.
  • papillary muscle - contract when the rght ventricle contracts, as the tricuspid valve closes the muscles pull on the chordinae tendinae and prevent the cusps from swinging backwards into the right atrium. as the papillary muscles contract and relax chrodae tendinae transmit the resulting increase and decrease in tension respective to the valves
  • aorta is thicker because it has greater out flow of pressure to deal from the left ventricle blood leaving the heart into the aorta has greater pressure because the blood has to be carried all over the body whereas the pulmonary trunk only pumps blood to lungs
  • The tricuspid valve is between the right atrium and ventricle. The pulmonary valve is where the blood flows out of the right ventricle, into the pulmonary circuit.
The QRS complex corresponds to depolarization of the muscle fibers of the
  • ventricles
  • vibrations
  • AV node
  • AV bundle
Prevents blood movement from right ventricle to right atrium
  • d. cardiac vein
  • vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary trunk, pulmonary arteries, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta
  • m. tricuspid
  • c. mitral (bicuspid) valve
Layer largely composed of cardiac muscle tissue
  • h. myocardium
  • f. coronary sinus
  • g. endocardium
  • L. pulmonary trunk
The period during which a heart chamber is relaxing is
  • m. tricuspid
  • systole
  • c. mitral (bicuspid) valve
  • diastole
The fibers that carry cardiac impulses from the interventricular septum into the myocardium are called
  • AV valves are closing
  • cardiac cycle
  • Purkujie fibers
  • ventricles
supplies blood to heart muscle
  • e. coronary artery
  • k. pericardial sac
  • f. coronary sinus
  • d. cardiac vein
Drains blood from myocardium into right atrium
  • L. pulmonary trunk
  • f. coronary sinus
  • e. coronary artery
  • d. cardiac vein
An ECG is a recording of electrical changes occurring in the myocardium during the
  • AV node
  • d. cardiac vein
  • cardiac cycle
  • vibrations
distributes blood to body organs (systemic circuit) except lungs
  • AV bundle
  • a. aorta
  • are open
  • AV node
Gives rise to left and right pulmonary arteries
  • AV valves are closing
  • i. papilliary muscle
  • L. pulmonary trunk
  • f. coronary sinus
inner lining of heart chamber
  • k. pericardial sac
  • g. endocardium
  • h. myocardium
  • e. coronary artery
The what is located in the inferior portion of the inter arterial septum?
  • SA node
  • AV bundle
  • a. aorta
  • AV node
The T wave corresponds to re polarization of the muscle fibers of the
  • atria
  • vibrations
  • AV bundle
  • ventricles
list in order all the parts of the Blood Flow through the heart
  • c. mitral (bicuspid) valve
  • m. tricuspid
  • The right ventricle is smaller/thinner as it only has to pump blood through the lungs and back to the right side of the heart.The left side is much thicker/stronger/larger as it has to get the blood to go throughout the whole body.
  • vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary trunk, pulmonary arteries, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta
Membranes around heart
  • L. pulmonary trunk
  • j. pericardial cavity
  • k. pericardial sac
  • g. endocardium
Between cardiac cycles, cardiac muscle fibers remain how? with no detectable electrical changes
  • closed
  • vibrations
  • ventricles
  • polarized
The second sound of a cardiac cycle occurs when the
  • i. papilliary muscle
  • pulmonary and aortic valves are closing
  • j. pericardial cavity
  • L. pulmonary trunk
Normally, the what serves as the PACEMAKER of the heart
  • SA node
  • a. aorta
  • AV bundle
  • are open
The pulmonary and aortic valves open when the pressure in the what exceeds the pressure in the pulmonary trunk and aorta?
  • polarized
  • vibrations
  • ventricles
  • Purkujie fibers
Prevents blood movement from left ventricle to left atrium
  • f. coronary sinus
  • m. tricuspid
  • vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary trunk, pulmonary arteries, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta
  • c. mitral (bicuspid) valve
During ventricular contraction, the AV valves (tricuspid and mitral valves) are
  • are open
  • closed
  • AV node
  • polarized
The period during which a heart chamber is contracting is called
  • systole
  • AV node
  • diastole
  • m. tricuspid
0 h : 0 m : 1 s

Multiple Choice Questions
Answered Not Answered Not Visited Correct : 0 Incorrect : 0