Question 1

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 B)
G) A) and C)

Question 2

In fetal circulation,blood bypasses the lungs by flowing through the __________.

Accepted Answer

A)   umbilical vein and umbilical arteries
B)   fossa ovalis and umbilical arteries and vein
C)   foramen ovale and ductus arteriosus
D)   ductus venosus and ductus arteriosus
E)   ligamentum venosum and ligamentum arteriosumF) B) and D)
G) A) and D)

Question 3

The placenta begins to form after week 8.

Accepted Answer

A) True 
 B)False

Question 4

Senescence of the immune system makes older people more susceptible to cancer and infectious disease because of a decline in __________.

Accepted Answer

A)   alpha and beta globulins
B)   red blood cells and platelets
C)   complement proteins
D)   prothrombin and fibrinogen
E)   antigen-presenting cells and helper T cellsF) None of the above
G) A) and D)

Question 5

Primary germ layers are formed during __________

Accepted Answer

A)   implantation
B)   cleavage
C)   conception
D)   organogenesis
E)   gastrulationF) A) and E)
G) A) and D)

Question 6

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) A) and D)

Question 7

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) B) and D)
G) None of the above

Question 8

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

Accepted Answer

A) True 
 B)False

Exam 29: Human Development and Aging

A teratogen is most likely to cause __________.

Correct Answer
verified

Senescence of the immune system makes older people more susceptible to cancer and infectious disease because of a decline in __________.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Primary germ layers are formed during __________

Correct Answer
verified

In fetal circulation,blood bypasses the lungs by flowing through the __________.

Correct Answer
verified

The placenta begins to form after week 8.

Correct Answer
verified

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

Correct Answer
verified

Exam 29: Human Development and Aging

A teratogen is most likely to cause __________.

Correct AnswerverifiedShow Answer

Senescence of the immune system makes older people more susceptible to cancer and infectious disease because of a decline in __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Primary germ layers are formed during __________

Correct AnswerverifiedShow Answer

In fetal circulation,blood bypasses the lungs by flowing through the __________.

Correct AnswerverifiedShow Answer

The placenta begins to form after week 8.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified