At the time of parturition following changes occur, except one. Mark the except one Only one correct answer A. Closure of foramen of ovale B. Closure of ductus arteriosus C. Constriction of pulmonary artery D. Secretion of lecithin (surfactant) by pneumocytes-ll Previous Next
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Option C is the answer.
Explanation:
- Option C is the right answer, as during parturition pulmonary artery opens up and does not constrict.
- Closure of foramen of ovale and ductus arteriosus are important events of parturition.
- Secretion of lecithin(surfactant) by pneumocytes-II is the one of the most important events because if it fails to secrete, lungs will fail to expand and lead to death of newborn.
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