It's Your Heart

15 Points Per Correct Answer - No time limit  

1. What is the average weight of the adult human heart? 455 grams or about 16 ounces 710 grams or about 25 ounces 510 grams or about 18 ounces 310 grams or about 11 ounces

2. The cardiac output (CO) is equal to the heart rate (HR) times the stroke volume (SV) per beat. At rest with a heart rate of 72 beats per minute (HR) and a stroke volume (SV) of 55 milliliters (ml)of blood per beat, how much blood would flow through the heart in 24 hours? 6,625 liters or about 7,000 quarts 3,785 liters or about 4,000 quarts 5,702 liters or about 6,000 quarts 3,300 liters or about 3,500 quarts

3. The left ventricle pushes the blood into the aorta against considerable resistance. What is the pressure exerted by the left ventricle contracting called when measured during a physical examination? Arterial diastolic blood pressure Mean aortic pressure Mean Arterial blood pressure Arterial systolic blood presssure

4. In order for the blood to flow through the heart in only one direction there are four heart valves. What is the name of the heart valve that prevents the blood from flowing from the left ventricle back into the left atrium? Pulmonary valve Tricuspid valve Mitral valve Aortic valve

5. Normally the veins carry low oxygenated blood from the capillaries back to the heart. What are the only veins in the human body that regularly carry highly oxygenated blood? Inferior Vena Cava Pulmonary Veins Superior Vena Cave Carotid veins

6. Where are the sinuses of Valsalva located? Between the right and left atria At the junction of the aortic arch and the carotid artery At the bifurcation of the pulmonary artery The beginning of the ascending aorta

7. What is the first branch of the left coronary artery? None of these Acute marginal coronary artery Septal perforating coronary artery Left anterior descending coronary artery

8. From one heart contraction to the next contraction, what percent of the time for this cycle is the heart in the diastolic (non-contractile) phase? 33 percent 50 percent 67 percent 75 percent

9. What is the mean arterial blood pressure in a person whose systolic blood pressure is 162 mm. Hg. and whose diastolic blood pressure is 120 mm. Hg.? 134 mm. Hg. 93 mm. Hg. 141 mm. Hg. 152 mm. Hg.

10. In the human fetus what is the anatomical characteristic of the heart and main cardiac vessels that prevents blood passing to the lungs of the non-breathing unborn child? Pulmonary valve remains closed. Pulmonary artery is diverted to the placenta Trunk of pulmonary artery is under-developed. Pulmonary artery branches into the arterial duct.