This topic contains a solution. Click here to go to the answer

Author Question: Which of following embryonic germinal tissue layers form all tissues and organs? 1. Endoderm 2. ... (Read 54 times)

haleyc112

  • Hero Member
  • *****
  • Posts: 600
Which of following embryonic germinal tissue layers form all tissues and organs? 1. Endoderm 2. Mesoderm 3. Ectoderm 4. Mectoderm
 
  a. 2 only
  b. 2 and 3 only
  c. 1, 2, and 4 only
  d. 1, 2, and 3 only

Question 2

If premature delivery is anticipated, all of the following will help determine lung maturity, ex-cept:
 
  a. the presence of oligohydramnios.
  b. lecithin-sphingomyelin (L:S) ratio.
  c. phosphatidylglycero l (PG) concentration.
  d. body mass index (BMI).



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Viet Thy

  • Sr. Member
  • ****
  • Posts: 329
Answer to Question 1

ANS: D
The three embryologically distinct germinal tissue layers form all tissues and organs: endoderm, mesoderm, and ectoderm.

Answer to Question 2

ANS: D
Quantification of these phospholipids (the L/S ratio and PG concentration) provides a predictive index of the lung maturity in the fetus before birth and the risks of the development of respira-tory distress. For example, an L/S ratio of 2 or more indicates a relatively low risk for the devel-opment of respiratory distress syndrome while an L/S ratio of less than 1.5 is associated with a high risk. Conditions that lead to reduced fetal breathing and amniotic fluid formation (oligohy-dramnios) are linked to incomplete inflation of the lung with fluid and poorly developed (hypo-plastic) lungs.





 

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

For a complete list of videos, visit our video library