Within the fetus, much of the circulating blood bypasses the lungs and flows through the ______________.
1. ductus venosus
2. umbilical vein
3. umbilical artery
4. ductus arteriosus

Labor can be hastened by:
1. progesterone
2. estradiol
3. prostaglandins
4. HCG

Till approximately what gestation age is the use of the term ‘embryo’ justified?
1. week
2. two weeks
3. month
4. two months

Lactation after child birth is possible due to decrease in the secretion of:
1. HCG
2. oxytocin
3. FSH and LH
4. estrogen and progesterone

Human lungs develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm

In humans, the majority of the placenta is formed by:
1. allantois
2. amnion
3. chorion
4. yolk sac

Human embryos will develop into female by default due to:
1. presence of an X chromosome
2. an ovarian determining factor
3. presence of a Y chromosome
4. lacks of Y sex chromosome

Milk secretion by mammary glands is under the control of:

Human nervous system is derived from embryonic:

1. ectoderm

2. endoderm

3. epiderm

4. mesoderm

The epidermis and the dermis of the skin develops respectively from embryonic:
1. ectoderm, endoderm
2. ectoderm, mesoderm
3. endoderm, mesoderm
4. endoderm, ectoderm