Cardiovascular · Heart Anatomy & Electrical Conduction

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Sample questions from Cardiovascular · Heart Anatomy & Electrical Conduction

This material has 90 questions with answers and rationales. Here are the first 5.

1. 1.Which chamber receives deoxygenated blood from the superior and inferior venae cavae?

   • A.Right atrium
   • B.Right ventricle
   • C.Left atrium
   • D.Left ventricle

   Rationale: The right atrium receives systemic venous blood from the venae cavae before it passes through the tricuspid valve. The right ventricle pumps blood toward the lungs, not directly from the venae cavae. The left atrium receives oxygenated blood from the pulmonary veins, and the left ventricle pumps that blood to the systemic circulation.

2. 2.Which valve lies between the left atrium and left ventricle?

   • A.Tricuspid valve
   • B.Pulmonary valve
   • C.Mitral valve
   • D.Aortic valve

   Rationale: The mitral, or bicuspid, valve separates the left atrium from the left ventricle. The tricuspid valve is on the right side between the right atrium and ventricle. The pulmonary valve guards the right ventricular outflow, while the aortic valve guards the left ventricular outflow.

3. 3.A nurse is tracing blood flow from the right ventricle to the lungs. Which structure does blood enter immediately after leaving the ventricle?

   • A.Pulmonary veins
   • B.Pulmonary trunk
   • C.Aorta
   • D.Superior vena cava

   Rationale: Blood leaves the right ventricle through the pulmonary semilunar valve and enters the pulmonary trunk, which divides into the pulmonary arteries. Pulmonary veins return oxygenated blood from the lungs to the left atrium. The aorta carries blood from the left ventricle, and the superior vena cava returns systemic venous blood to the right atrium.

4. 4.Which statement about the pulmonary arteries is correct?

   • A.They carry oxygenated blood to the body.
   • B.They return oxygenated blood to the left atrium.
   • C.They carry deoxygenated blood from the right ventricle toward the lungs.
   • D.They return deoxygenated blood to the right atrium.

   Answer and rationale are in the full material.

5. 5.Which heart layer is the thick muscular layer responsible for generating the force of contraction?

   • A.Endocardium
   • B.Myocardium
   • C.Epicardium
   • D.Pericardial cavity

   Answer and rationale are in the full material.