Learning Outcome 23.2

1			The prenatal period lasts _____.
			A)	266 days
			B)	36 weeks
			C)	9 lunar months
			D)	10 lunar months

Learning Outcome 23.7

2			Which of these is NOT an endodermal derivative?
			A)	urinary bladder
			B)	urethra
			C)	lining of stomach
			D)	epidermis

Learning Outcome 23.10

3			When would drugs or radiation produce the greatest harm?
			A)	early fetus
			B)	in the ninth week
			C)	fourth week
			D)	late pregnancy

Learning Outcome 23.14

4			The period of infancy ends at _____.
			A)	two months
			B)	two years
			C)	one year
			D)	18 months

Learning Outcome 23.8

5			What is the major distinguishing factor that separates the embryonic stage from the fetal stage?
			A)	All major organ systems form during the embryonic stage; the fetal stage consists mainly of rapid growth.
			B)	The brain forms late in the fetal stage; all other organ systems form earlier.
			C)	The skeletal system is laid down during the fetal stage, otherwise organ systems form during the embryonic stage.
			D)	The major event of the embryonic stage is implantation in the uterus; all development occurs during the fetal stage.

Learning Outcome 23.11

6			There are two umbilical veins and one umbilical artery.
			A)	True
			B)	False

Learning Outcome 23.10

7			The vernix caseosa is the fine hair that covers the fetus.
			A)	True
			B)	False

Learning Outcome 23.10

8			The fetal alcohol syndrome is caused by the teratogenic effects of alcohol.
			A)	True
			B)	False

Learning Outcome 23.10

9			The rubella virus commonly causes deafness and visual deficits when contracted by a fetus.
			A)	True
			B)	False

Learning Outcome 23.8

10			The labioscrotal folds could become labia or scrotal skin in the fourth week.
			A)	True
			B)	False