Chapter 05 Fetal Period

Chapter 05  Fetal Period

Complete Chapter Questions And Answers
 

Sample Questions

7. ________ Skin is wrinkled and pink to red
A.
12 weeks
B.
16 weeks
C.
20 weeks
D.
25 weeks
E.
29 weeks

ANS: D
During the 21- to 25-week period, the skin usually is wrinkled and pink to red because blood in the capillaries is visible through the thin, transparent skin. During the subsequent 4 weeks, considerable subcutaneous fat forms, smoothing out many of the wrinkles.

8. ________ Quickening usually occurs
A.
12 weeks
B.
16 weeks
C.
20 weeks
D.
25 weeks
E.
29 weeks

ANS: C
During the 17- to 20-week period, movements of the fetus—quickening—usually are felt by the mother for the first time. Although the fetus begins to move several weeks earlier, the movements are usually too slight to be felt by the mother.

9. ________ Skeleton first shows clearly on radiographs and sonograms
A.
12 weeks
B.
16 weeks
C.
20 weeks
D.
25 weeks
E.
29 weeks

ANS: B
Toward the end of the 13- to 16-week period, the skeleton clearly shows on radiographs (x-ray films). Care is taken to prevent the fetus from receiving too much radiation because of the possible adverse effects on its germ cells and developing brain. Sonography is widely used for examining the fetus.

10. ________ Sex is first distinguishable externally
A.
12 weeks
B.
16 weeks
C.
20 weeks
D.
25 weeks
E.
29 weeks

ANS: A
Sex is first distinguishable during the 8- to 12-week period. At 8 weeks, the external genitalia of males and females appear similar. By the tenth week, it may be possible to differentiate between males and females, but the mature form of the genitalia is not reached until the 12th week.