« previous next »

Author Question: Oxygen content is highest in which of the following fetal structures? a. Ductus venosus b. ... (Read 94 times)

lak

  • Hero Member
  • *****
  • Posts: 546
on: Jun 28, 2018
Oxygen content is highest in which of the following fetal structures?
 
  a. Ductus venosus
  b. Foramen ovale
  c. Umbilical artery
  d. Umbilical vein

Question 2

The foramen ovale closes after birth because of:
 
  a. Increased pressure in the left atrium
  b. High oxygen content of the blood
  c. Constriction of umbilical vessels
  d. Decreased pressure in the right ventricle


batool

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jun 28, 2018
Answer to Question 1

ANS: D
Because oxygenated blood from the mother passes through the placenta to the fetus through the umbilical vein, blood in the umbilical vein has the highest oxygen content of the listed structures.

Answer to Question 2

ANS: A
The increase in pulmonary blood flow after birth causes the pressure in the left atrium to exceed that of the right atrium. This functionally closes the foramen ovale. Permanent closure occurs as adhesions develop.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

lak

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Jun 28, 2018
Thank you


batool

  • Sr. Member
  • ****
  • Posts: 320
Reply #3 on: Jun 28, 2018
No problemo


« previous next »
 

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

A comparison of the sizes of various chemical and biological structures, and the resolving power of A comparison of the sizes of various chemical and biological structures, and the resolving power of
Maternal-fetal incompatibility in the Rh system. Maternal-fetal incompatibility in the Rh system.
A midline view of the posterior and anterior pituitary and surrounding structures. A midline view of the posterior and anterior pituitary and surrounding structures.
Symmetries of protein quaternary structures Symmetries of protein quaternary structures
Repeating structures of some glycosaminoglycans Repeating structures of some glycosaminoglycans
Summary of Structures of the Ear Summary of Structures of the Ear
Video: Genetic distance between human groups

For a complete list of videos, visit our video library