- Answer: (B) The Amount of Blood Ejected from lt Ventricle
- Explanation: As mentioned earlier, cardiac output refers to the volume of blood pumped by the left ventricle per minute.
- Answer: (D) Closing Of Semilunar Valves
- Explanation: The “dupp” sound is the second heart sound, which occurs when the semilunar valves (aortic and pulmonary) close at the end of ventricular systole (contraction).
- Answer: (A) Aorta
- Explanation: The aorta originates from the left ventricle and is the largest artery in the human body. It carries oxygenated blood to all parts of the body.