Which hormone stimulates more frequent and more powerful contractions of the uterus as birth nears?
A) estrogen
B) relaxin
C) progesterone
D) oxytocin
E) gonadotropin
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Question 2) An embryo is known as a fetus by the ________ week of pregnancy.
A) first
B) second
C) fourth
D) ninth
E) twelfth
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Question 3) The placenta is usually functioning to deliver nutrients and oxygen to, and remove waste from, the embryonic blood by the ________ week of pregnancy.
A) first
B) second
C) third
D) fourth
E) fifth
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Question 4) What fluid-filled sac surrounds the fetus?
A) amnion
B) placenta
C) chorionic villi
D) umbilical cord
E) mesoderm
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Question 5) Which primary germ layer gives rise to the mucosae and associated glands?
A) ectoderm
B) blastocyst
C) mesoderm
D) endoderm
E) morula
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Question 6) The tiny ball of 16 cells found freely floating in the uterine cavity is called a ________.
A) blastocyst
B) zygote
C) morula
D) placenta
E) trophoblast
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Question 7) Why is human chorionic gonadotropin (hCG) important early in pregnancy?
A) guides the embryo to the appropriate site for implantation
B) promotes cleavage of the zygote
C) prevent other sperm from fertilization the oocyte
D) prods the corpus luteum to continue producing hormones
E) promotes menstruation
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Question 8) An embryo is called a(n) ________ when it reaches around 100 cells, and appears to be a hollow, ball-like structure.
A) endoderm
B) trophoblast
C) inner cell mass
D) blastocyst
E) zygote
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Question 9) From fertilization to week 8 of pregnancy, the conceptus is called ________.
A) a fetus
B) an embryo
C) a baby
D) a zygote
E) a morula
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Question 10) The clusters of specific glands that produce milk when a woman is lactating are called ________.
A) lactiferous ducts
B) areolar glands
C) sebaceous glands
D) alveolar glands
E) lactating glands
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