Question 1

From which primary germ layer is the heart derived?

Accepted Answer

A) Ectoderm 
B) Mesoderm 
C) Endoderm 
A) Ectoderm 
B) Mesoderm 
C) Endoderm

Question 2

What is the name given to substances that can cause birth defects or even death if exposure to them occurs during the embryonic period?

Accepted Answer

A) Mutagens 
B) Antibiotics 
C) Fungicides 
D) Teratogens 
E) Pesticides 
A) Mutagens 
B) Antibiotics 
C) Fungicides 
D) Teratogens 
E) Pesticides

Question 3

The single cell resulting from fertilization is a(n)

Accepted Answer

A) blastocyst. 
B) morula. 
C) trophoblast. 
D) embryoblast. 
E) zygote. 
A) blastocyst. 
B) morula. 
C) trophoblast. 
D) embryoblast. 
E) zygote.

Question 4

The implantation process begins by about day _____ following fertilization.

Accepted Answer

A) 2 
B) 4 
C) 7 
D) 10 
E) 12 
A) 2 
B) 4 
C) 7 
D) 10 
E) 12

Question 5

The process of separating homologous chromosomes is termed

Accepted Answer

A) replication. 
B) reduction division. 
C) nondisjunction. 
D) cleavage. 
E) differentiation. 
A) replication. 
B) reduction division. 
C) nondisjunction. 
D) cleavage. 
E) differentiation.

Question 6

Once implantation takes place the pre-embryo is divided into two general areas.Which of these two actually gives rise to the embryo?

Accepted Answer

A) Trophoblast 
B) Cytotrophoblast 
C) Syncytiotrophoblast 
D) Embryoblast 
E) Morula 
A) Trophoblast 
B) Cytotrophoblast 
C) Syncytiotrophoblast 
D) Embryoblast 
E) Morula

Question 7

Oogenesis is the formation of

Accepted Answer

A) a new autosomal cell. 
B) a new somatosomal cell. 
C) a sperm. 
D) an egg. 
E) new ovaries. 
A) a new autosomal cell. 
B) a new somatosomal cell. 
C) a sperm. 
D) an egg. 
E) new ovaries.

Question 8

During embryonic development,a process called transverse folding creates the

Accepted Answer

A) digestive and respiratory tracts. 
B) pelvic girdle and lower appendages. 
C) cylindrical trunk or torso region of the embryo. 
D) primary germ layers. 
E) neural tube. 
A) digestive and respiratory tracts. 
B) pelvic girdle and lower appendages. 
C) cylindrical trunk or torso region of the embryo. 
D) primary germ layers. 
E) neural tube.

Question 9

Following ovulation,how long does a secondary oocyte remain viable?

Accepted Answer

A) For about 1-2 hours 
B) Approximately 12 hours 
C) For about 1 day 
D) Between 3-5 days 
E) For approximately 1 week 
A) For about 1-2 hours 
B) Approximately 12 hours 
C) For about 1 day 
D) Between 3-5 days 
E) For approximately 1 week

Question 10

The acrosome

Accepted Answer

A) carries the DNA. 
B) is responsible for movement of a spermatozoan. 
C) provides nourishment to the sperm. 
D) contains enzymes to break through protective layers surrounding the secondary oocyte. 
E) initiates growth of the sperm tail. 
A) carries the DNA. 
B) is responsible for movement of a spermatozoan. 
C) provides nourishment to the sperm. 
D) contains enzymes to break through protective layers surrounding the secondary oocyte. 
E) initiates growth of the sperm tail.

Question 11

In the human,the diploid genetic condition occurs

Accepted Answer

A) when the number of chromosomes equals the number of genes. 
B) when a cell has 23 pairs of chromosomes. 
C) when a cell has the (n)number of chromosomes. 
D) when a cell has 23 chromosomes. 
E) in each gamete just before fertilization. 
A) when the number of chromosomes equals the number of genes. 
B) when a cell has 23 pairs of chromosomes. 
C) when a cell has the (n)number of chromosomes. 
D) when a cell has 23 chromosomes. 
E) in each gamete just before fertilization.

Question 12

Which is regarding the process of meiosis?

Accepted Answer

A) Meiosis begins in a haploid state and concludes in the diploid condition. 
B) Meiosis forms haploid daughter cells from a diploid cell. 
C) Meiosis is represented by the notation: n $\rightarrow$ 2n. 
D) Most growth in the body is accomplished through meiosis. 
E) Meiosis results in identical sex cells. 
A) Meiosis begins in a haploid state and concludes in the diploid condition. 
B) Meiosis forms haploid daughter cells from a diploid cell. 
C) Meiosis is represented by the notation: n $\rightarrow$ 2n. 
D) Most growth in the body is accomplished through meiosis. 
E) Meiosis results in identical sex cells.

Question 13

What would happen if capacitation did not occur?

Accepted Answer

A) The egg (oogonium)would not mature. 
B) Ejaculation could not occur. 
C) The sperm could not reach the egg. 
D) Ovulation could not occur. 
E) Spermiogenesis would be impeded. 
A) The egg (oogonium)would not mature. 
B) Ejaculation could not occur. 
C) The sperm could not reach the egg. 
D) Ovulation could not occur. 
E) Spermiogenesis would be impeded.

Question 14

The human sex cells are called

Accepted Answer

A) spores. 
B) genes. 
C) gonads. 
D) gametes. 
A) spores. 
B) genes. 
C) gonads. 
D) gametes.

Question 15

Although the early digestive system maintains contact with the embryonic yolk sac,it does not gain any nourishment from the sac.Instead,the yolk sac is involved with the formation of

Accepted Answer

A) the heart and lungs. 
B) the reproductive organs. 
C) blood vessels and blood cells. 
D) bones. 
E) skeletal muscle tissue. 
A) the heart and lungs. 
B) the reproductive organs. 
C) blood vessels and blood cells. 
D) bones. 
E) skeletal muscle tissue.

Question 16

Neural crest cells give rise to

Accepted Answer

A) melanocytes. 
B) the adrenal medulla. 
C) spinal ganglia 
D) skeletal and muscular components of the head. 
E) All of the choices are correct. 
A) melanocytes. 
B) the adrenal medulla. 
C) spinal ganglia 
D) skeletal and muscular components of the head. 
E) All of the choices are correct.

Question 17

This figure shows a cross-sectional view of the developing embryo.Which of the three primary germ layers does number 1 indicate?

Accepted Answer

A) Ectoderm 
B) Mesoderm 
C) Endoderm 
A) Ectoderm 
B) Mesoderm 
C) Endoderm

Exam 3: Embryology

From which primary germ layer is the heart derived?

What is the name given to substances that can cause birth defects or even death if exposure to them occurs during the embryonic period?

The single cell resulting from fertilization is a(n)

The implantation process begins by about day _____ following fertilization.

The process of separating homologous chromosomes is termed

Once implantation takes place the pre-embryo is divided into two general areas.Which of these two actually gives rise to the embryo?

Oogenesis is the formation of

During embryonic development,a process called transverse folding creates the

Following ovulation,how long does a secondary oocyte remain viable?

The acrosome

In the human,the diploid genetic condition occurs

Which is regarding the process of meiosis?

What would happen if capacitation did not occur?

The human sex cells are called

Although the early digestive system maintains contact with the embryonic yolk sac,it does not gain any nourishment from the sac.Instead,the yolk sac is involved with the formation of

Neural crest cells give rise to

This figure shows a cross-sectional view of the developing embryo.Which of the three primary germ layers does number 1 indicate?

A First Look at Anatomy

The Celt Basic Unit of Structure and Function

Tissue Level of Organization

Integumentary System

Cartilage and Bone

Axial Skeleton

Appendicular Skeleton

Articulations

Muscle Tissue and Organization

Axial Muscles

Appendicular Muscles

Surface Anatomy

Nervous Tissue

Brain and Cranial Nerves

Spinal Cord and Spinal Nerves

Pathways and Integrative Functions

Autonomic Nervous System

Senses: General and Special

Endocrine System

Blood

Heart

Vessels and Circulation

Lymphatic System

Respiratory System

Digestive System

Urinary System

Reproductive System

Filters