Question 1

Trophoblastic nutrition refers to the nutrition of the conceptus before it implants.

Accepted Answer

A) True 
 B)False

Question 2

The first body cavity is called the __________.

Accepted Answer

A)  coelom
B)  amniotic cavity
C)  yolk sac
D)  somite
E)  chorionF) A) and D)
G) D) and E)

Question 3

A teratogen is most likely to cause __________.

Accepted Answer

A)  a deformity of the limbs
B)  aneuploidy
C)  trisomy
D)  nondisjunction
E)  a mutationF) All of the above
G) None of the above

Question 4

As it implants,the conceptus is nourished by means of __________.

Accepted Answer

A)  trophoblastic nutrition
B)  uterine milk
C)  nutrient diffusion from the endometrium
D)  placenta
E)  umbilical nutritionF) A) and B)
G) A) and E)

Question 5

The most likely outcome of nondisjunction is the production of a gamete receiving __________.

Accepted Answer

A)  no chromosomes
B)  46 chromosomes
C)  44 chromosomes
D)  23 chromosomes
E)  22 chromosomesF) C) and D)
G) None of the above

Question 6

Which of the folllowing lists the stages or structures of prenatal development in the correct order?

Accepted Answer

A)  Cleavage, zygote, morula, blastocyst, embryo, fetus
B)  Zygote, morula, blastocyst, cleavage, embryo, fetus
C)  Zygote, cleavage, morula, blastocyst, embryo, fetus
D)  Zygote, embryo, morula, blastocyst, cleavage, fetus
E)  Embryo, zygote, blastocyst, cleavage, morula, fetusF) A) and E)
G) C) and D)

Question 7

Senescence begins at different ages and progresses at different rates in different organ systems.

Accepted Answer

A) True 
 B)False

Question 8

The fertilization membrane is the endometrial tissue that receives the conceptus.

Accepted Answer

A) True 
 B)False

Question 9

The _________ begins to develop about 11 days after conception,and is the sole source of fetal nutrition from the end of week 12 until birth.

Accepted Answer

A)  yolk sac
B)  placenta
C)  amnion
D)  trophoblast
E)  blastocystF) D) and E)
G) A) and B)

Question 10

Mesenchyme gives rise to __________.

Accepted Answer

A)  nervous tissue
B)  muscle, bone, and blood
C)  digestive organs and endocrine glands
D)  reproductive and urinary systems
E)  the integumentary system and exocrine glandsF) A) and D)
G) A) and B)

Question 11

During implantation,the trophoblast divides into a superficial layer called the __________,which is composed of a multinucleate mass of cytoplasm.

Accepted Answer

A)  chorion
B)  embryoblast
C)  amnion
D)  syncytiotrophoblast
E)  cytotrophoblastF) A) and B)
G) B) and C) D

Question 12

By the end of 8 weeks,the individual is considered a fetus because __________.

Accepted Answer

A)  all the primary germ layers are formed
B)  the amniotic cavity has formed
C)  all of the organ systems are present
D)  the neural tube and yolk sac have formed
E)  the mesoderm has formedF) A) and C)
G) A) and E)

Question 13

The fossa ovalis is a remnant of the __________ of the fetus.

Accepted Answer

A)  ductus arteriosus
B)  ductus venosus
C)  umbilical artery
D)  umbilical vein
E)  foramen ovaleF) A) and B)
G) A) and E) E

Question 14

Which of the following is not a derivative of ectoderm?

Accepted Answer

A)  Salivary glands
B)  The nervous system
C)  The epidermis
D)  Cutaneous glands
E)  The dermisF) A) and B)
G) A) and C)

Question 15

Neonatal immunity depends on IgG and IgA acquired through the placenta and colostrum,respectively.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not a reason muscular weakness tends to develop in old age?

Accepted Answer

A)  Aged muscle has less glycogen, myoglobin, and creatine phosphate.
B)  There are fewer motor neurons in the spinal cord.
C)  Aged muscle fibers have fewer myofibrils.
D)  There are fewer and smaller mitochondria in aged muscle.
E)  The myocytes of aged muscle no longer synthesize myosin.F) A) and B)
G) A) and C)

Question 17

The __________ encloses all the rest of the membranes and the embryo.

Accepted Answer

A)  chorion
B)  allantois
C)  yolk sac
D)  amnion
E)  zona pellucidaF) A) and E)
G) B) and C)

Question 18

In the blastocyst,the trophoblast will become __________,whereas the embryoblast will become __________.

Accepted Answer

A)  part of the placenta; the yolk sac
B)  part of the placenta; the embryo
C)  the embryo; part of the placenta
D)  the embryo; the yolk sac
E)  the yolk sac; the embryoF) A) and B)
G) C) and D)

Question 19

Which of the following is not a known cause of congenital anomalies?

Accepted Answer

A)  Infectious disease in the mother during pregnancy
B)  A genetic disorder
C)  Exposure to teratogens during pregnancy
D)  Smoking during lactation
E)  Smoking during pregnancyF) A) and C)
G) C) and D)

Question 20

Regarding fertilization,which of the following events happens first?

Accepted Answer

A)  Formation of a fertilization membrane
B)  The fast block to polyspermy
C)  The slow block to polyspermy
D)  The cortical reaction
E)  The acrosomal reactionF) B) and E)
G) A) and B) E

Exam 29: Human Development and Aging

Trophoblastic nutrition refers to the nutrition of the conceptus before it implants.

Correct AnswerverifiedShow Answer

The first body cavity is called the __________.

Correct AnswerverifiedShow Answer

A teratogen is most likely to cause __________.

Correct AnswerverifiedShow Answer

As it implants,the conceptus is nourished by means of __________.

Correct AnswerverifiedShow Answer

The most likely outcome of nondisjunction is the production of a gamete receiving __________.

Correct AnswerverifiedShow Answer

Which of the folllowing lists the stages or structures of prenatal development in the correct order?

Correct AnswerverifiedShow Answer

Senescence begins at different ages and progresses at different rates in different organ systems.

Correct AnswerverifiedShow Answer

The fertilization membrane is the endometrial tissue that receives the conceptus.

Correct AnswerverifiedShow Answer

The _________ begins to develop about 11 days after conception,and is the sole source of fetal nutrition from the end of week 12 until birth.

Correct AnswerverifiedShow Answer

Mesenchyme gives rise to __________.

Correct AnswerverifiedShow Answer

During implantation,the trophoblast divides into a superficial layer called the __________,which is composed of a multinucleate mass of cytoplasm.

Correct AnswerverifiedD

By the end of 8 weeks,the individual is considered a fetus because __________.

Correct AnswerverifiedShow Answer

The fossa ovalis is a remnant of the __________ of the fetus.

Correct AnswerverifiedE

Which of the following is not a derivative of ectoderm?

Correct AnswerverifiedShow Answer

Neonatal immunity depends on IgG and IgA acquired through the placenta and colostrum,respectively.

Correct AnswerverifiedShow Answer

Which of the following is not a reason muscular weakness tends to develop in old age?

Correct AnswerverifiedShow Answer

The __________ encloses all the rest of the membranes and the embryo.

Correct AnswerverifiedShow Answer

In the blastocyst,the trophoblast will become __________,whereas the embryoblast will become __________.

Correct AnswerverifiedShow Answer

Which of the following is not a known cause of congenital anomalies?

Correct AnswerverifiedShow Answer

Regarding fertilization,which of the following events happens first?

Correct AnswerverifiedE

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D

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E

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In the blastocyst,the trophoblast will become ,whereas the embryoblast will become .

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E