Question 1

The earliest period of prenatal development is the _________ period.

Accepted Answer

A)   embryonic
B)   neonatal
C)   germinal
D)   infant
E)   fetalF) A) and B)
G) C) and D)

Question 2

The prenatal period during which the major organ systems form is the

Accepted Answer

A)   fetal period.
B)   germinal period.
C)   embryonic period.
D)   neonatal period.E) None of the above
F) A) and D)

Question 3

At the time of implantation, the human embryo is in a stage of development known as the

Accepted Answer

A)   fetus.
B)   zygote.
C)   morula.
D)   blastocyst.
E)   egg.F) A) and E)
G) B) and E)

Question 4

If neither testosterone nor mullerian-inhibiting hormone is secreted during embryonic development

Accepted Answer

A)   the paramesonephric duct system degenerates.
B)   the mesonephric duct system is stimulated.
C)   internally female reproductive structures form.
D)   the individual appears as a male.
E)   internally male reproductive structures form.F) None of the above
G) All of the above

Question 5

The placenta and membranes surrounding the embryo develop from the

Accepted Answer

A)   morula.
B)   blastocyst.
C)   trophoblast.
D)   inner cell mass.
E)   blastocele.F) B) and C)
G) A) and D)

Question 6

Arm and legs buds appear at about 28 days from

Accepted Answer

A)   the coelom.
B)   apical ectodermal ridges.
C)   somitomeres.
D)   neural crest cells.E) All of the above
F) A) and C)

Question 7

Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?

Accepted Answer

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

Question 8

When the embryonic mass of cells develops an internal cavity, the mass of cells is called a(n)

Accepted Answer

A)   zygote.
B)   morula.
C)   blastocyst.
D)   embryonic disc.
E)   trophoblast.F) D) and E)
G) A) and B)

Question 9

An APGAR score of _____ is considered normal at 1 to 5 minutes after birth.

Accepted Answer

A)   2
B)   5
C)   9
D)   12
E)   25F) D) and E)
G) A) and D)

Question 10

Cryptorchidism

Accepted Answer

A)   is the failure of the testes to descend into the scrotal sac.
B)   may be due to excessive amounts of testosterone in the fetus.
C)   has no effect on fertility.
D)   results in feminization of the male fetus.
E)   is the lack of testes.F) C) and D)
G) None of the above

Question 11

The embryonic membrane that completely encloses the embryo in a watery sac is the

Accepted Answer

A)   yolk sac.
B)   amnion.
C)   allantois.
D)   chorion.
E)   ectodermal sac.F) C) and D)
G) B) and E)

Question 12

Which of the following characterizes the developmental age of an eight month old infant?

Accepted Answer

A)   sits without support
B)   rolls from its back to its side
C)   smiles in response to people's faces
D)   pulls itself up to a standing position
E)   None of these choices is correctF) C) and E)
G) A) and B)

Question 13

An embryo becomes a fetus about

Accepted Answer

A)   14 days after fertilization.
B)   30 days after fertilization.
C)   60 days after fertilization.
D)   3 months after fertilization.
E)   6 months after fertilization.F) A) and B)
G) A) and C)

Question 14

A different form of an allele at a particular locus that can have no effect to major effects on the phenotype is a(n)

Accepted Answer

A)   allelic variant.
B)   mutated allele.
C)   polymorphism.
D)   All of the choices are correct.E) All of the above
F) A) and B)

Question 15

Which gland develops from an evagination of the ectoderm in the roof of the embryonic oral cavity?

Accepted Answer

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

Question 16

Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?

Accepted Answer

A)   pancreas
B)   thyroid gland
C)   adrenal medulla
D)   adenohypophysis
E)   parathyroid glandsF) A) and B)
G) A) and C)

Question 17

What genetic disorder is a type of dwarfism characterized by shortening of the upper and lower limbs?

Accepted Answer

A)   albinism
B)   sickle-cell disease
C)   hemophilia
D)   Down syndrome
E)   achondroplasiaF) B) and D)
G) None of the above

Question 18

Placenta previa occurs when

Accepted Answer

A)   a normally placed placenta tears away from the uterine wall.
B)   the placenta is formed too early.
C)   implantation occurs close to the cervix.
D)   implantation occurs in the fundus of the uterus.E) All of the above
F) None of the above

Question 19

Organogenesis is generally completed by day _____ of development.

Accepted Answer

A)   20
B)   30
C)   45
D)   60
E)   75F) B) and C)
G) C) and D)

Question 20

The onset of puberty is considered to be the beginning of which life stage?

Accepted Answer

A)   early childhood
B)   late childhood
C)   adolescence
D)   young adult
E)   middle ageF) A) and D)
G) A) and E)

Exam 29: Development, Growth, Aging, and Genetics

If neither testosterone nor mullerian-inhibiting hormone is secreted during embryonic development

Correct AnswerverifiedShow Answer

Arm and legs buds appear at about 28 days from

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Which gland develops from an evagination of the ectoderm in the roof of the embryonic oral cavity?

Correct AnswerverifiedShow Answer

Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?

Correct AnswerverifiedShow Answer

An APGAR score of _____ is considered normal at 1 to 5 minutes after birth.

Correct AnswerverifiedShow Answer

Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?

Correct AnswerverifiedShow Answer

The embryonic membrane that completely encloses the embryo in a watery sac is the

Correct AnswerverifiedShow Answer

The prenatal period during which the major organ systems form is the

Correct AnswerverifiedShow Answer

The onset of puberty is considered to be the beginning of which life stage?

Correct AnswerverifiedShow Answer

An embryo becomes a fetus about

Correct AnswerverifiedShow Answer

At the time of implantation, the human embryo is in a stage of development known as the

Correct AnswerverifiedShow Answer

Which of the following characterizes the developmental age of an eight month old infant?

Correct AnswerverifiedShow Answer

Placenta previa occurs when

Correct AnswerverifiedShow Answer

Cryptorchidism

Correct AnswerverifiedShow Answer

What genetic disorder is a type of dwarfism characterized by shortening of the upper and lower limbs?

Correct AnswerverifiedShow Answer

A different form of an allele at a particular locus that can have no effect to major effects on the phenotype is a(n)

Correct AnswerverifiedShow Answer

The earliest period of prenatal development is the _________ period.

Correct AnswerverifiedShow Answer

When the embryonic mass of cells develops an internal cavity, the mass of cells is called a(n)

Correct AnswerverifiedShow Answer

The placenta and membranes surrounding the embryo develop from the

Correct AnswerverifiedShow Answer

Organogenesis is generally completed by day _____ of development.

Correct AnswerverifiedShow Answer

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