Question 1

Under the influence of the trophoblast, maternal blood vessels in the endometrium

Accepted Answer

A)  disappear. 
B)  attach to the inner cell mass. 
C)  break down and form lacunae. 
D)  form a capillary network in the trophoblast. 
E)  increase in size and penetrate the blastocyst. 
A)  disappear. 
B)  attach to the inner cell mass. 
C)  break down and form lacunae. 
D)  form a capillary network in the trophoblast. 
E)  increase in size and penetrate the blastocyst.

Question 2

After fertilization, the first cell division is completed

Accepted Answer

A)  within a few seconds. 
B)  within the hour. 
C)  about 6 hours later. 
D)  in 12 hours. 
E)  more than a day later. 
A)  within a few seconds. 
B)  within the hour. 
C)  about 6 hours later. 
D)  in 12 hours. 
E)  more than a day later.

Question 3

Non-sex chromosomes are called

Accepted Answer

A)  homologous. 
B)  homozygous. 
C)  heterozygous. 
D)  autosomal. 
E)  chromatids. 
A)  homologous. 
B)  homozygous. 
C)  heterozygous. 
D)  autosomal. 
E)  chromatids.

Question 4

By the end of gestation, maternal blood volume normally increases by almost ________ percent.

Accepted Answer

A)  20 
B)  25 
C)  50 
D)  80 
E)  100 
A)  20 
B)  25 
C)  50 
D)  80 
E)  100

Question 5

A zygote whose genotype is XX will develop as a ________.

Accepted Answer

The answer of A zygote whose genotype is XX will...

Question 6

Which of these is a puberty related change caused by increased testosterone levels?

Accepted Answer

A)  accelerated bone deposition and skeletal growth 
B)  loss of terminal hairs on the face and chest 
C)  replication of skeletal muscle fibers 
D)  thinning of the vocal folds 
E)  decreased erythropoiesis 
A)  accelerated bone deposition and skeletal growth 
B)  loss of terminal hairs on the face and chest 
C)  replication of skeletal muscle fibers 
D)  thinning of the vocal folds 
E)  decreased erythropoiesis

Question 7

The region known as the primitive streak is the site of

Accepted Answer

A)  migration of mesodermal cells to form the endoderm. 
B)  endoderm formation. 
C)  ectoderm formation. 
D)  migration of ectodermal cells to form the mesoderm. 
E)  amnion formation. 
A)  migration of mesodermal cells to form the endoderm. 
B)  endoderm formation. 
C)  ectoderm formation. 
D)  migration of ectodermal cells to form the mesoderm. 
E)  amnion formation.

Question 8

The alternate forms of any one gene are called

Accepted Answer

A)  homologous. 
B)  homozygous. 
C)  heterozygous. 
D)  autosomes. 
E)  alleles. 
A)  homologous. 
B)  homozygous. 
C)  heterozygous. 
D)  autosomes. 
E)  alleles.

Question 9

The solid ball of cells that has been likened to a mulberry is called a

Accepted Answer

A)  chorion. 
B)  blastula. 
C)  gastrula. 
D)  morula. 
E)  blastocyst. 
A)  chorion. 
B)  blastula. 
C)  gastrula. 
D)  morula. 
E)  blastocyst.

Question 10

The infancy stage of life is considered to be over at

Accepted Answer

A)  age 1. 
B)  age 2. 
C)  6 months. 
D)  1 month. 
E)  18 months. 
A)  age 1. 
B)  age 2. 
C)  6 months. 
D)  1 month. 
E)  18 months.

Question 11

All of the following occur at puberty, except that

Accepted Answer

A)  FSH levels rise. 
B)  GnRH levels decline. 
C)  levels of sex hormones rise. 
D)  gametogenesis begins. 
E)  secondary sexual characteristics begin to develop. 
A)  FSH levels rise. 
B)  GnRH levels decline. 
C)  levels of sex hormones rise. 
D)  gametogenesis begins. 
E)  secondary sexual characteristics begin to develop.

Question 12

________ are nearly identical cells that are produced by early cleavages.

Accepted Answer

A)  Blastomeres 
B)  Morulas 
C)  Gastrulas 
D)  Amnions 
E)  Blastulas 
A)  Blastomeres 
B)  Morulas 
C)  Gastrulas 
D)  Amnions 
E)  Blastulas

Question 13

A space opens within the inner cell mass that will form the

Accepted Answer

A)  blastocoele. 
B)  lacunae. 
C)  amniotic cavity. 
D)  chorion. 
E)  allantois. 
A)  blastocoele. 
B)  lacunae. 
C)  amniotic cavity. 
D)  chorion. 
E)  allantois.

Question 14

Figure 26-2 Fetus at 10 Weeks
Use Figure 26-2 to answer the following questions:
-Identify the structure labeled "6."

Accepted Answer

A)  umbilical cord 
B)  placenta 
C)  decidua basalis 
D)  amnion 
E)  decidua parietalis 
A)  umbilical cord 
B)  placenta 
C)  decidua basalis 
D)  amnion 
E)  decidua parietalis

Question 15

The placenta is a source of which of these hormones?

Accepted Answer

A)  hCG 
B)  relaxin 
C)  placental lactogen 
D)  progesterone 
E)  all of the above 
A)  hCG 
B)  relaxin 
C)  placental lactogen 
D)  progesterone 
E)  all of the above

Question 16

Attachment to and penetration of the endometrium by the blastocyst is referred to as

Accepted Answer

A)  cleavage. 
B)  implantation. 
C)  placentation. 
D)  embryogenesis. 
E)  fertilization. 
A)  cleavage. 
B)  implantation. 
C)  placentation. 
D)  embryogenesis. 
E)  fertilization.

Question 17

The mesoderm and the trophoblast combine to form the

Accepted Answer

A)  amnion. 
B)  amniotic sac. 
C)  chorion. 
D)  allantois. 
E)  none of the above 
A)  amnion. 
B)  amniotic sac. 
C)  chorion. 
D)  allantois. 
E)  none of the above

Question 18

If an individual carries two different alleles for the same trait, the individual is ________ for the trait.

Accepted Answer

A)  homologous 
B)  homozygous 
C)  heterozygous 
D)  autosomous 
E)  polygenic 
A)  homologous 
B)  homozygous 
C)  heterozygous 
D)  autosomous 
E)  polygenic

Question 19

The first stage of labor is the ________ stage.

Accepted Answer

A)  dilation 
B)  expulsion 
C)  placental 
D)  decidual 
E)  neonate 
A)  dilation 
B)  expulsion 
C)  placental 
D)  decidual 
E)  neonate

Question 20

Which of these hormones is the cause of most puberty related changes in a female?

Accepted Answer

A)  estrogen 
B)  progesterone 
C)  oxytocin 
D)  relaxin 
E)  chorionic gonadotropin. 
A)  estrogen 
B)  progesterone 
C)  oxytocin 
D)  relaxin 
E)  chorionic gonadotropin.

Exam 26: Development and Inheritance

Under the influence of the trophoblast, maternal blood vessels in the endometrium

After fertilization, the first cell division is completed

Non-sex chromosomes are called

By the end of gestation, maternal blood volume normally increases by almost ________ percent.

A zygote whose genotype is XX will develop as a ________.

Which of these is a puberty related change caused by increased testosterone levels?

The region known as the primitive streak is the site of

The alternate forms of any one gene are called

The solid ball of cells that has been likened to a mulberry is called a

The infancy stage of life is considered to be over at

All of the following occur at puberty, except that

________ are nearly identical cells that are produced by early cleavages.

A space opens within the inner cell mass that will form the

Figure 26-2 Fetus at 10 Weeks Use Figure 26-2 to answer the following questions: -Identify the structure labeled "6."

The placenta is a source of which of these hormones?

Attachment to and penetration of the endometrium by the blastocyst is referred to as

The mesoderm and the trophoblast combine to form the

If an individual carries two different alleles for the same trait, the individual is ________ for the trait.

The first stage of labor is the ________ stage.

Which of these hormones is the cause of most puberty related changes in a female?

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Cellular Level of Organization

Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Skeleton

Articulations

Skeletal Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood and Blood Vessels

The Heart and Cardiovascular Function

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

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