2.4 Exercises for Lesson 2
1. Of the two fetal membranes, which one is the smooth, slippery, glistening innermost membrane that lines the amniotic space?
2. How long (number of months) is a trimester? ________________
3. Lightening occurs during the ________________trimester.
4. What is the normal duration of pregnancy? __________________
5. List the tests that are used to assess fetal maturity and well-being.
6. Possible maternal risk of the amniocentesis includes: _____ and _____
For exercises 7 through 16. Use the following terms to complete the sentences or statements.
7. ______ originate from the same ovum and are always of the same sex.
8. An increase in size is known as ______.
9. The _____ is the outer membrane of the two fetal membranes.
10. The ____ is a fleshy disk-like organ.
11. The combined ovum and sperm. _______.
12. A sequence of events that normally includes fertilization, implantation, embryonic growth, and fetal growth that terminates in birth. _______.
13. The joining together of the ovum and sperm cells is referred to as _____.
14. A period of four weeks (28 days). ______
15. The result of pregnancies involving two or more fetuses is known as _____ and ______.
16. Twins from two separate ova and sperm and may be of different sexes. __________
17. During the third trimester, passive immunity to some diseases is provided by the mother. List the diseases the fetus receives temporary protection from.
18. What changes occur in circulation after birth to the following parts?
Umbilical vein -_______
Ductus venosus - _______
Umbilical arteries - ______
Foramen ovale - _____
Ductus arteriosus - _______
19. The ________ acts as the intermediary organ of transfer between the mother and the fetus.
20. How does the fetus receive oxygen? ________
Answers to Exercises for Lesson 2
2. 3 months
4. 9 1/2 to 10 months
Oxytocin challenge test.
Breast stimulation test.
Contraction stress test
Inadvertent damage to the intestines or bladder
7 . identical twins
14. lunar month
16. fraternal twins
18. Umbilical vein--is obliterated and becomes the round ligament of the liver.
Ductus venosus--is obliterated and becomes a ligament.
Umbilical arteries--are obliterated and ultimately becomes ligaments.
Foramen ovale--closes after birth, after the umbilical cord is tied and cut.
Ductus arteriosus--is obliterated and becomes a ligament.
20. through the placenta