List three prenatal tests that might be offered to a pregnant ...

[formula1]

List three prenatal tests that might be offered to a pregnant woman, describe each test, and comment on the benefits and drawbacks of each test.
 
  What will be an ideal response?

Question 2

Children who are heavy TV viewers are less physically active overall.
 
  a. True
  b. False
  Indicate whether the statement is true or false

[macmac]

Answer to Question 1

The student should note that ultrasound, amniocentesis, and chorionic villus sampling are all discussed in the textbook. Professors may choose to award credit for other answers (e.g., nuchal fold translucency screening) based on their own presentation of materials.
a) Ultrasound  provides a picture of the unborn child by passing sound waves into the womb using a small instrument, is noninvasive, can determine the sex and position of the child, and can identify gross physical defects or multiple birth pregnancies. The picture produced is grainy and takes expertise to interpret.
b) Amniocentesis  involves using a needle to draw out amniotic fluid for genetic analysis. Allows for the genotype of the child to be determined, but takes two weeks for results. Also increases the chance of miscarriage.
c) Chorionic villus sampling  involves removing part of the placenta for analysis, and can be done much earlier than amniocentesis. Allows for certain genetic screening, but takes 7 to 10 days for results to be returned. Also increases the chance of miscarriage.

Answer to Question 2

True

[formula1]

Excellent

[carojassy25]

Gracias!