Question 1

Which of the following statements concerning development of the integumentary system is true?

Accepted Answer

A) The epidermis is derived from mesoderm. 
B) The melanocytes are derived from ectoderm. 
C) Nails,hair,and glands develop from the dermis. 
D) Sensory receptors in the skin are derived from the epidermis. 
E) Collagen fibers do not appear until after birth. 
A) The epidermis is derived from mesoderm. 
B) The melanocytes are derived from ectoderm. 
C) Nails,hair,and glands develop from the dermis. 
D) Sensory receptors in the skin are derived from the epidermis. 
E) Collagen fibers do not appear until after birth.

Question 2

What term means that both alleles are different?

Accepted Answer

A) locus 
B) alleles 
C) homozygous 
D) heterozygous 
E) karyotype 
A) locus 
B) alleles 
C) homozygous 
D) heterozygous 
E) karyotype

Question 3

When the dominant allele does not completely mask the effects of the recessive allele in the heterozygote,it is called

Accepted Answer

A) dominance. 
B) polygenic dominance. 
C) codominance. 
D) incomplete dominance. 
E) corecessive. 
A) dominance. 
B) polygenic dominance. 
C) codominance. 
D) incomplete dominance. 
E) corecessive.

Question 4

The male and female reproductive systems begin as an indifferent stage.If testosterone is present,which of the following occurs?

Accepted Answer

A) The paramesonephric duct forms the vagina. 
B) The mesonephric ducts form the ductus deferens. 
C) The mesonephric ducts atrophy. 
D) The paramesonephric ducts enlarge to form the scrotum. 
E) The paramesonephric duct atrophies. 
A) The paramesonephric duct forms the vagina. 
B) The mesonephric ducts form the ductus deferens. 
C) The mesonephric ducts atrophy. 
D) The paramesonephric ducts enlarge to form the scrotum. 
E) The paramesonephric duct atrophies.

Question 5

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

Question 6

Which of the following chromosome anomalies can be found in either sex?

Accepted Answer

A) Turner's Syndrome (XO) 
B) Klinefelter's Syndrome (XXY) 
C) Down Syndrome (Trisomy 21) 
D) Barker's Syndrome 
E) They all can be found in either sex. 
A) Turner's Syndrome (XO) 
B) Klinefelter's Syndrome (XXY) 
C) Down Syndrome (Trisomy 21) 
D) Barker's Syndrome 
E) They all can be found in either sex.

Question 7

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 8

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 9

Down Syndrome is an example of an aneuploidy called

Accepted Answer

A) monosomy 21. 
B) trisomy 21. 
C) monosomy 23. 
D) trisomy 17. 
E) disomy 21. 
A) monosomy 21. 
B) trisomy 21. 
C) monosomy 23. 
D) trisomy 17. 
E) disomy 21.

Question 10

Which gland is formed by an evagination from the floor of the diencephalon?

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 11

Which of the following structures is NOT involved in the formation of the face?

Accepted Answer

A) apical ectodermal ridges 
B) frontonasal process 
C) maxillary processes 
D) mandibular processes 
A) apical ectodermal ridges 
B) frontonasal process 
C) maxillary processes 
D) mandibular processes

Question 12

The hormone(s)responsible for preparing the breasts for lactation during pregnancy is (are).

Accepted Answer

A) estrogen. 
B) progesterone. 
C) oxytocin. 
D) prolactin. 
E) both estrogen and progesterone. 
A) estrogen. 
B) progesterone. 
C) oxytocin. 
D) prolactin. 
E) both estrogen and progesterone.

Question 13

Which germ layer is the cardiovascular system derived from?

Accepted Answer

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

Question 14

Which of the following vitamins are thought to play a role in decreasing the physiological changes in aging?

Accepted Answer

A) vitamins A and B12 
B) vitamins A and B6 
C) vitamins E and C 
D) vitamins A and D 
E) vitamins A and K 
A) vitamins A and B12 
B) vitamins A and B6 
C) vitamins E and C 
D) vitamins A and D 
E) vitamins A and K

Question 15

The embryonic disk is initially composed of

Accepted Answer

A) ectoderm and hypoblast. 
B) epiblast and mesoderm. 
C) epiblast and hypoblast. 
D) hypoblast and yolk sac. 
E) epiblast and yolk sac. 
A) ectoderm and hypoblast. 
B) epiblast and mesoderm. 
C) epiblast and hypoblast. 
D) hypoblast and yolk sac. 
E) epiblast and yolk sac.

Question 16

The greenish discharge from the lower digestive tract shortly after birth is called

Accepted Answer

A) colostrum. 
B) jaundice. 
C) bile. 
D) meconium. 
E) prolactin. 
A) colostrum. 
B) jaundice. 
C) bile. 
D) meconium. 
E) prolactin.

Question 17

If the secondary palate does not fuse the result is a

Accepted Answer

A) cleft palate. 
B) cleft throat. 
C) facial cleft. 
D) cleft lip. 
E) cleft tongue. 
A) cleft palate. 
B) cleft throat. 
C) facial cleft. 
D) cleft lip. 
E) cleft tongue.

Question 18

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 19

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 20

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.

Exam 29: Development,growth,aging,and Genetics

Which of the following statements concerning development of the integumentary system is true?

What term means that both alleles are different?

When the dominant allele does not completely mask the effects of the recessive allele in the heterozygote,it is called

The male and female reproductive systems begin as an indifferent stage.If testosterone is present,which of the following occurs?

The placenta plays an important role in

Which of the following chromosome anomalies can be found in either sex?

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

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

Down Syndrome is an example of an aneuploidy called

Which gland is formed by an evagination from the floor of the diencephalon?

Which of the following structures is NOT involved in the formation of the face?

The hormone(s)responsible for preparing the breasts for lactation during pregnancy is (are).

Which germ layer is the cardiovascular system derived from?

Which of the following vitamins are thought to play a role in decreasing the physiological changes in aging?

The embryonic disk is initially composed of

The greenish discharge from the lower digestive tract shortly after birth is called

If the secondary palate does not fuse the result is a

Organogenesis is generally completed by day _____ of development.

The cytotrophoblast

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

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

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