After birth the pulmonary artery is the only artery in the body ...

[vicky]

After birth the pulmonary artery is the only artery in the body that:
 
  a. has a high concentration of hemoglobin c. carries deoxygenated blood
  b. has a high-pressure vascular bed d. returns blood to the heart

Question 2

Birth weights differ with ethnic backgrounds. Which of the following babies are typically the largest at birth, compared to the others?
 
  a. European American c. Chinese
  b. Native American d. Japanese

[allisonblackmore]

Answer to Question 1

C

Feedback
A Incorrect. The pulmonary artery carries deoxygenated blood. Since most oxygen carried in the blood is bound to hemoglobin and the pulmonary artery carries deoxygenated blood, it does not have a high concentration of hemoglobin.
B Incorrect. The pulmonary vascular bed is a low-pressure vascular bed.
C Correct. After birth the pulmonary artery is the only artery in the body that carries deoxygenated blood. All other arteries including the aorta carry oxygenated blood.
D Incorrect. The pulmonary artery carries blood from the right ventricle to the lungs for oxygenation. It does not return blood to the heart.

Answer to Question 2

B

Feedback
A Incorrect. European American babies do not have the largest birth weights.
B Correct. Native American infants are often heavier at birth than European American infants.
C Incorrect. Chinese babies do not have the largest birth weights, and are usually lighter than European American babies.
D Incorrect. Japanese babies do not have the largest birth weights, and are usually lighter than European American babies.