Multiple choice

Which of the following statements is correct regarding respiration in the fetus and newborn?

  1. The peripheral chemoreceptors are well functional in the developing embryo and in a newborn.

  2. In the newborn, complete output of the right ventricle is sent to the lungs.

  3. Deficiency of surfactant in the newborn has no effect on respiration.

  4. The first breath in a newborn is associated with numerous modulation in the intrathoracic pressure.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The newborns first breath the lungs, which were filled with fluid during pregnancy. The lungs must suddenly fill with oxygen from the air. The fluid in the lungs is removed through the blood and lymph system, and is replaced by air. At the same time, vigorous blood circulation in the lungs begins.

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