Question 1

One of the major problems a premature infant may develop is respiratory distress syndrome. This occurs because in a premature infant

Accepted Answer

A)  oxygen transport is impaired. 
B)  surfactant isn't produced. 
C)  the lungs are collapsed. 
D)  there aren't enough red blood cells to carry oxygen. 
E)  there is mixing of the arterial and venous blood. 
A)  oxygen transport is impaired. 
B)  surfactant isn't produced. 
C)  the lungs are collapsed. 
D)  there aren't enough red blood cells to carry oxygen. 
E)  there is mixing of the arterial and venous blood.

Question 2

The eyes develop as an evagination from the

Accepted Answer

A)  myelencephalon. 
B)  mesencephalon. 
C)  neural crest cells. 
D)  diencephalon. 
E)  telencephalon. 
A)  myelencephalon. 
B)  mesencephalon. 
C)  neural crest cells. 
D)  diencephalon. 
E)  telencephalon.

Question 3

Which germ layer are the bones (except facial) derived from?

Accepted Answer

A)  ectoderm 
B)  mesoderm 
C)  endoderm 
A)  ectoderm 
B)  mesoderm 
C)  endoderm

Question 4

Failure of the neural tube to close in the region of the head results in

Accepted Answer

A)  anencephaly. 
B)  ventricular enlargement. 
C)  cleft palate. 
D)  soft spots on the skull. 
E)  hydrocephaly. 
A)  anencephaly. 
B)  ventricular enlargement. 
C)  cleft palate. 
D)  soft spots on the skull. 
E)  hydrocephaly.

Question 5

The process of forming three germ layers from the embryonic disk is called ______.

Accepted Answer

A)  gastrulation 
B)  differentiation 
C)  fertilization 
D)  meiosis 
E)  implantation 
A)  gastrulation 
B)  differentiation 
C)  fertilization 
D)  meiosis 
E)  implantation

Question 6

Through what structure do epiblast cells migrate to form the mesoderm?

Accepted Answer

A)  lacunae 
B)  chorionic villi 
C)  hypoblast 
D)  primitive streak 
E)  blastocele 
A)  lacunae 
B)  chorionic villi 
C)  hypoblast 
D)  primitive streak 
E)  blastocele

Question 7

Fine, soft hair that covers the fetus is called

Accepted Answer

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

Question 8

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin $\alpha$6$\beta$1. This is called the

Accepted Answer

A)  slow block to polyspermy. 
B)  acrosomal reaction. 
C)  fast block to polyspermy. 
D)  fertilization. 
E)  spermiogenesis. 
A)  slow block to polyspermy. 
B)  acrosomal reaction. 
C)  fast block to polyspermy. 
D)  fertilization. 
E)  spermiogenesis.

Question 9

The cytotrophoblast

Accepted Answer

A)  forms the chorionic villi. 
B)  replaces the syncytiotrophoblast. 
C)  remains throughout development. 
D)  forms branches that protrude into the amniotic cavity. 
E)  is not an embryonic part of the placenta. 
A)  forms the chorionic villi. 
B)  replaces the syncytiotrophoblast. 
C)  remains throughout development. 
D)  forms branches that protrude into the amniotic cavity. 
E)  is not an embryonic part of the placenta.

Question 10

Puberty in females occurs _____ than in males.

Accepted Answer

A)  earlier 
B)  later 
C)  at the same time 
A)  earlier 
B)  later 
C)  at the same time

Question 11

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

Question 12

What genetic disorder is characterized by lack of skin, hair, eye coloration?

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 13

Which germ layer is tooth enamel derived from?

Accepted Answer

A)  ectoderm 
B)  mesoderm 
C)  endoderm 
A)  ectoderm 
B)  mesoderm 
C)  endoderm

Question 14

Genes on the X chromosomes are

Accepted Answer

A)  polygenic. 
B)  X-linked. 
C)  simple. 
D)  holandric. 
E)  Y-linked. 
A)  polygenic. 
B)  X-linked. 
C)  simple. 
D)  holandric. 
E)  Y-linked.

Question 15

Many of the emotional characteristics of a person are formed during

Accepted Answer

A)  infancy. 
B)  early childhood. 
C)  adolescence. 
D)  adulthood. 
E)  neonatal period. 
A)  infancy. 
B)  early childhood. 
C)  adolescence. 
D)  adulthood. 
E)  neonatal period.

Question 16

Decreased renal filtration that occurs with aging can be the result of

Accepted Answer

A)  increased respiratory effort. 
B)  decreased cardiac output. 
C)  increased fluid volume. 
D)  decreased ADH secretion. 
E)  decreased peripheral resistance. 
A)  increased respiratory effort. 
B)  decreased cardiac output. 
C)  increased fluid volume. 
D)  decreased ADH secretion. 
E)  decreased peripheral resistance.

Question 17

Which germ layer is the thymus derived from?

Accepted Answer

A)  ectoderm 
B)  mesoderm 
C)  endoderm 
A)  ectoderm 
B)  mesoderm 
C)  endoderm

Question 18

Which of the following statements concerning the embryonic circulatory system is true?

Accepted Answer

A)  The heart develops from four endothelial tubes. 
B)  Blood vessels form from blood islands. 
C)  An opening in the interatrial septum is called the sinus venosus. 
D)  The bulbus cordis becomes the sinoatrial node (the adult pacemaker). 
E)  There is an opening in the interventricular septum. 
A)  The heart develops from four endothelial tubes. 
B)  Blood vessels form from blood islands. 
C)  An opening in the interatrial septum is called the sinus venosus. 
D)  The bulbus cordis becomes the sinoatrial node (the adult pacemaker). 
E)  There is an opening in the interventricular septum.

Question 19

Which of the following is an example of incomplete dominance?

Accepted Answer

A)  minor thalassemia 
B)  major thalassemia 
C)  beta thalassemia 
D)  polymorphism 
E)  ABO blood groups 
A)  minor thalassemia 
B)  major thalassemia 
C)  beta thalassemia 
D)  polymorphism 
E)  ABO blood groups

Question 20

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

Exam 29: Development, Growth, Aging, and Genetics

One of the major problems a premature infant may develop is respiratory distress syndrome. This occurs because in a premature infant

The eyes develop as an evagination from the

Which germ layer are the bones (except facial) derived from?

Failure of the neural tube to close in the region of the head results in

The process of forming three germ layers from the embryonic disk is called ______.

Through what structure do epiblast cells migrate to form the mesoderm?

Fine, soft hair that covers the fetus is called

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin α\alphaα 6 β\betaβ 1. This is called the

The cytotrophoblast

Puberty in females occurs _____ than in males.

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?

What genetic disorder is characterized by lack of skin, hair, eye coloration?

Which germ layer is tooth enamel derived from?

Genes on the X chromosomes are

Many of the emotional characteristics of a person are formed during

Decreased renal filtration that occurs with aging can be the result of

Which germ layer is the thymus derived from?

Which of the following statements concerning the embryonic circulatory system is true?

Which of the following is an example of incomplete dominance?

The stage of labor in which the fetus is expelled is

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, Electrolyte, and Acid-Based Balance

Reproductive System

Filters

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin $\alpha$ 6 $\beta$ 1. This is called the