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Human Anatomy online quiz focuses on “Embryology – Fetal Membranes and Placenta Development”.
1. The ____________ is the primitive digestive tract or gut.
A. Ectoderm
B. Endoderm
C. Mesoderm
D. Archenteron
Answer: D
Clarification: Archenteron is the rudimentary alimentary cavity of an embryo at the gastrula stage. It develops into endoderm and mesoderm.
2. Umbilical arteries carry __________ blood to the placenta.
A. oxygenated
B. deoxygenated
C. mixed maternal and fetal
D. no
Answer: b
Clarification: Umbilical arteries carry Deoxygenated blood to placenta. The artery is named for the fetus side and the placental veins therefore, it returns oxygenated blood to the fetus.
3. Placenta produces __________
A. Prolactin
B. Oxytocin
C. FSH
D. Estrogen and progesterone
Answer: D
Clarification: Placenta produces Estrogen and progesterone. It also produces HCG and HPL hormones.
4. Placenta has fetal side and maternal side.
A. True
B. False
View Answer
Answer: A
Clarification: Placenta has two distinct separate compartments. The fetal side consisting of the trophoblast and chorionic villi and maternal side consisting of the deciduas basalis.
5. When does the development of heart begin?
A. 1st week
B. 12th week
C. 5th week
D. 3rd week
Answer: D
Clarification: The heart and other organs start developing during 3rd week after conception. The baby’s brain and spinal cord will develop from neural tube.
6. Embryonic development includes first ___________ of development.
A. Week
B. 2 weeks
C. 2 Month
D. 9 months
View Answer
Answer: C
Clarification: Embryogenesis is the process by which the embryo forms and develops. It starts with fertilization of egg cell by a sperm cell.
7. Development requires _____________
A. Gastrulation and neuralation
B. Cellular cleavage and fusion
C. Growth cellular differentiation and morphogenesis
D. Neurulation and induction
Answer: c
Clarification: Development requires Growth cellular differentiation and morphogenesis. Morphogenesis is a process that causes an organism to develop its shape.
8. During which stage do the three primary layers first appear?
A. Blastulation
B. Neurulation
C. Fertilization
D. Gastrulation
Answer: D
Clarification: Gastrulation is a phase in embryonic development during which single layered blastula is reorganized into multilayered structure known as gastrula.
9. A newborn infant obtains maternal antibodies from _____________
A. lanugo
B. rubella
C. colostrum
D. afterbirth
Answer: c
Clarification: Colostrum is a form of milk produced by mammary gland of mammals during pregnancy. It contains antibodies to protect newborns from disease.
10. Human placenta is derived from _____________
A. chorion
B. allantois
C. amnion
D. allantois and chorion
View Answer
Answer: A
Clarification: Human placenta is derived from Chorion. The chorion and amnion together forms amniotic sac.
11. The first movement of fetus and the appearance of hair on head occurs during?
A. 5th month
B. 7th month
C. 2nd month
D. 9th month
Answer: A
Clarification: The first movement of fetus is seen between 16 and 25 weeks of pregnancy. It is called as quickening.
12. Which one of the following is not a placental hormone?
A. Progesterone
B. HCS
C. HCG
D. Melatonin
Answer: D
Clarification: Melatonin is not a placental hormone. It is secreted by the Pineal gland.
13. Mother’s milk during lactation is rich in _________
A. IgA
B. IgG
C. IgM
D. IgE
Answer: A
Clarification: IgA is an antibody that plays a major role in the immune function of mucous membranes. Mother’s milk is rich in IgA antibody to protect the new born.
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