Question 1

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

Question 2

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)  achondroplasia 
A)  albinism 
B)  sickle-cell disease 
C)  hemophilia 
D)  Down syndrome 
E)  achondroplasia

Question 3

Organogenesis is generally completed by day _____ of development.

Accepted Answer

A)  20 
B)  30 
C)  45 
D)  60 
E)  75 
A)  20 
B)  30 
C)  45 
D)  60 
E)  75

Question 4

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 ovale 
A)  ductus arteriosus 
B)  umbilical vein 
C)  umbilical artery 
D)  ductus venosus 
E)  foramen ovale

Question 5

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

Question 6

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. 
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.

Question 7

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. 
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.

Question 8

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 age 
A)  early childhood 
B)  late childhood 
C)  adolescence 
D)  young adult 
E)  middle age

Question 9

The placenta and membranes surrounding the embryo develop from the

Accepted Answer

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

Question 10

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 correct 
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 correct

Question 11

The earliest period of prenatal development is the _________ period.

Accepted Answer

A)  embryonic 
B)  neonatal 
C)  germinal 
D)  infant 
E)  fetal 
A)  embryonic 
B)  neonatal 
C)  germinal 
D)  infant 
E)  fetal

Question 12

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)  pancreas 
A)  anterior pituitary gland 
B)  posterior pituitary gland 
C)  thyroid gland 
D)  adrenal glands 
E)  pancreas

Question 13

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. 
A)  fetal period. 
B)  germinal period. 
C)  embryonic period. 
D)  neonatal period.

Question 14

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

Question 15

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

Question 16

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. 
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.

Question 17

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)  25 
A)  2 
B)  5 
C)  9 
D)  12 
E)  25

Question 18

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. 
A)  the coelom. 
B)  apical ectodermal ridges. 
C)  somitomeres. 
D)  neural crest cells.

Question 19

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. 
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.

Question 20

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 glands 
A)  pancreas 
B)  thyroid gland 
C)  adrenal medulla 
D)  adenohypophysis 
E)  parathyroid glands

Exam 29: Development, Growth, Aging, and Genetics

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

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

Organogenesis is generally completed by day _____ of development.

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

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

An embryo becomes a fetus about

Cryptorchidism

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

The placenta and membranes surrounding the embryo develop from the

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

The earliest period of prenatal development is the _________ period.

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

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

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

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

Placenta previa occurs when

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

Arm and legs buds appear at about 28 days from

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

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?

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

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