Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 12
Which of the following changes does not occur when a fetus is delivered
and begins to breathe on its own for the first time?
1. the rate of blood flow through
pulmonary circulation decreases
2. the foramen ovale closes
3. the ductus arteriosus closes
4. the resistance to blood flow
through the lung decreases
one year ago

Answers : (1)

Apurva Sharma
196 Points
The answer is 1.
Because, at the time of birth the bypass of foramen ovale and ductus arteriosus cease to act with the start of breathing, and foramen ovale becomes fossa ovalis, ductus arteriosus becomes ligamentum arteriosum. 
Also increased oxygen in the lungs causes dectease in blood flow resistance to lungs.
Thus option 1 is the answer.
Hope it helps. Do give a thubsup👍
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

  • 728 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution

Course Features

  • 50 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!! Click Here for details