Question 46 What is the pulmonary artery? Artery carrying oxygen-rich blood from the heart to the lungs Artery carrying oxygen-poor blood from the lungs to the heart Artery carrying oxygen-poor blood from the heart to the lungs Artery carrying oxygen-rich blood from the lungs to the heart Question 47 What does the diastolic blood pressure reveal? Pressure on the mitral valve Pressure in the artery when the left ventricle is contracting Pressure in the artery when the ventricles are relaxed Pressure on the tricuspid valve

**Question 46:**<br /><br />**Artery carrying oxygen-poor blood from the heart to the lungs**<br /><br />The pulmonary artery is unique among arteries. Most arteries carry oxygenated blood *away* from the heart to the body's tissues. The pulmonary artery carries deoxygenated blood *away* from the heart, but specifically *to* the lungs to pick up oxygen.<br /><br />**Question 47:**<br /><br />**Pressure in the artery when the ventricles are relaxed**<br /><br />Diastolic blood pressure is the lower number in a blood pressure reading (e.g., in 120/80, the diastolic pressure is 80). It represents the pressure in the arteries when the heart muscle is between beats, allowing the ventricles to fill with blood. Systolic pressure, conversely, is the pressure when the ventricles are contracting.<br />