Question 1

A cleft lip results when

Accepted Answer

A)   the two halves of the secondary palate do not fuse.
B)   the frontonasal and maxillary processes do not fuse.
C)   the lateral edges of the nasal placodes do not fuse with the maxillary processes.
D)   the maxillary processes do not fuse with the mandibular processes.
E)   None of these choices is correct.F) B) and C)
G) C) and D)

Question 2

-The picture shows a full term pregnancy. What does "C" represent?

Accepted Answer

A)   placenta
B)   umbilical cord
C)   urinary bladder
D)   mucus plug in cervical canal
E)   vaginaF) A) and D)
G) B) and D)

Question 3

What genetic disorder is caused by having three chromosomes 21?

Accepted Answer

A)   albinism
B)   sickle-cell disease
C)   hemophilia
D)   Down syndrome
E)   achondroplasiaF) B) and E)
G) B) and D)

Question 4

-What does "A" represent on the diagram?

Accepted Answer

A)   fertilization
B)   morula
C)   blastocyst
D)   implantation
E)   ovulationF) A) and D)
G) C) and E)

Question 5

The first functional kidney is the

Accepted Answer

A)   mesonephros.
B)   pronephros.
C)   allantois.
D)   bulbos cordis.
E)   urorectal septum.F) B) and E)
G) A) and E)

Question 6

When stretch receptors in the cervix are stimulated by the continually increasing pressure of the fetus, afferent neurons send impulses to the maternal hypothalamus resulting in

Accepted Answer

A)   increased estrogen production.
B)   increased oxytocin production.
C)   increased fetal CRH production.
D)   increased growth in the size of the placenta.
E)   decreased oxytocin production.F) A) and B)
G) B) and C)

Question 7

The genotype WW is best described as

Accepted Answer

A)   homozygous recessive.
B)   homozygous dominant.
C)   heterozygous dominant.
D)   heterozygous recessive.
E)   homorecessive.F) A) and B)
G) B) and C)

Question 8

The birth process is called

Accepted Answer

A)   micturition.
B)   gastrulation.
C)   organogenesis.
D)   parturition.
E)   expulsion.F) D) and E)
G) B) and D)

Question 9

The waxy coat of sloughed epithelial cells that covers the fetus is called

Accepted Answer

A)   lanugo.
B)   fetal hair.
C)   colostrum.
D)   vernix caseosa.
E)   primary hair.F) A) and E)
G) D) and E)

Question 10

What structure forms the roof of the mouth?

Accepted Answer

A)   mesonephros
B)   mandibular processes
C)   neural tube
D)   secondary palate
E)   somitesF) D) and E)
G) B) and D)

Question 11

Autoimmune diseases such as arthritis become more common as people get older. "Autoimmune" means that the immune system

Accepted Answer

A)   no longer produces antibodies.
B)   destroys the body's own tissues.
C)   is incapable of initiating phagocytosis.
D)   produces T cells but no B cells.
E)   protects itself.F) B) and E)
G) A) and D)

Question 12

Fusion of the male and female pronuclei

Accepted Answer

A)   results in an oocyte forming.
B)   restores the diploid number of chromosomes.
C)   occurs before ovulation.
D)   results in a haploid cell forming.
E)   results in a total of 23 chromosomes.F) None of the above
G) A) and C)

Question 13

What term means that both alleles are different?

Accepted Answer

A)   locus
B)   alleles
C)   homozygous
D)   heterozygous
E)   karyotypeF) D) and E)
G) C) and D)

Question 14

Which germ layer is the urinary bladder derived from?

Accepted Answer

A)   ectoderm
B)   mesoderm
C)   endodermD) All of the above
E) None of the above

Question 15

The stage of labor in which the fetus is expelled is

Accepted Answer

A)   the first stage.
B)   the second stage.
C)   the third stage.
D)   the fourth stage.
E)   the fifth stage.F) C) and D)
G) A) and B)

Question 16

Arrange the following in the sequence in which they form in the embryo. (1)  neural plate
(2)  neural tube
(3)  notochord
(4)  primitive streak

Accepted Answer

A)   1, 2, 3, 4
B)   1, 3, 2, 4
C)   4, 3, 1, 2
D)   4, 1, 3, 2
E)   3, 4, 1, 2F) B) and C)
G) C) and D)

Question 17

The chorionic villi

Accepted Answer

A)   form from branches of the syncytiotrophoblast cords.
B)   increase surface area of the amniotic cavity.
C)   contribute to the formation of the placenta.
D)   are necessary for implantation to occur.
E)   are not part of the placental formation.F) A) and B)
G) A) and E)

Question 18

Which gland is derived from both neural crest cells and mesoderm?

Accepted Answer

A)   anterior pituitary gland
B)   posterior pituitary gland
C)   thyroid gland
D)   adrenal glands
E)   pancreasF) B) and E)
G) A) and B)

Question 19

The embryonic heart

Accepted Answer

A)   develops from two endothelial tubes that fuse together.
B)   consists of four chambers.
C)   has two atria but only one ventricle.
D)   doesn't beat until just prior to birth.
E)   has no passages connecting right side to left side.F) A) and E)
G) B) and D)

Question 20

The placenta plays an important role in

Accepted Answer

A)   implantation.
B)   onset of lactation.
C)   beginning of parturition.
D)   provision of nutrients to the fetus.
E)   insulating the fetus.F) C) and D)
G) A) and E)

Exam 29: Development, Growth, Aging, and Genetics

When stretch receptors in the cervix are stimulated by the continually increasing pressure of the fetus, afferent neurons send impulses to the maternal hypothalamus resulting in

Correct AnswerverifiedShow Answer

The chorionic villi

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What term means that both alleles are different?

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Which gland is derived from both neural crest cells and mesoderm?

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The first functional kidney is the

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A cleft lip results when

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The waxy coat of sloughed epithelial cells that covers the fetus is called

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The birth process is called

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Fusion of the male and female pronuclei

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What structure forms the roof of the mouth?

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Which germ layer is the urinary bladder derived from?

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The stage of labor in which the fetus is expelled is

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The placenta plays an important role in

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Arrange the following in the sequence in which they form in the embryo. (1) neural plate (2) neural tube (3) notochord (4) primitive streak

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-The picture shows a full term pregnancy. What does "C" represent?

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The embryonic heart

Correct AnswerverifiedShow Answer

The genotype WW is best described as

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What genetic disorder is caused by having three chromosomes 21?

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Autoimmune diseases such as arthritis become more common as people get older. "Autoimmune" means that the immune system

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-What does "A" represent on the diagram?

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