Question 1

The placenta is not a source of which of the following hormones?

Accepted Answer

A) hCG 
B) relaxin 
C) placental lactogen 
D) progesterone 
E) prolactin 
A) hCG 
B) relaxin 
C) placental lactogen 
D) progesterone 
E) prolactin

Question 2

Distinguish among embryonic,fetal,and prenatal development.

Accepted Answer

A) Embryonic development refers to the events that occur during the first 2 months after fertilization.Fetal development begins at the 9th week and continues until birth.Prenatal development consists of both embryonic and fetal development. 
B) Embryonic development begins at the 9th week and continues until birth.Fetal development refers to the events that occur during the first 2 months after fertilization.Prenatal development consists of both embryonic and fetal development. 
C) Embryonic development begins at fertilization and occurs until implantation.Fetal development begins at implantation and continues until the end of the second trimester.Prenatal development refers to the events of the third trimester. 
D) Embryonic development begins at implantation and continues until the end of the second trimester.Fetal development begins at fertilization and occurs until implantation.Prenatal development refers to the events of the third trimester. 
E) Embryonic development begins at implantation and continues until the end of the second trimester.Fetal development refers to the events of the third trimester.Prenatal development begins at birth and continues to maturity. 
A) Embryonic development refers to the events that occur during the first 2 months after fertilization.Fetal development begins at the 9th week and continues until birth.Prenatal development consists of both embryonic and fetal development. 
B) Embryonic development begins at the 9th week and continues until birth.Fetal development refers to the events that occur during the first 2 months after fertilization.Prenatal development consists of both embryonic and fetal development. 
C) Embryonic development begins at fertilization and occurs until implantation.Fetal development begins at implantation and continues until the end of the second trimester.Prenatal development refers to the events of the third trimester. 
D) Embryonic development begins at implantation and continues until the end of the second trimester.Fetal development begins at fertilization and occurs until implantation.Prenatal development refers to the events of the third trimester. 
E) Embryonic development begins at implantation and continues until the end of the second trimester.Fetal development refers to the events of the third trimester.Prenatal development begins at birth and continues to maturity.

Question 3

Fertilization is complete when which of the follow occurs?

Accepted Answer

A) oocyte activation 
B) pronucleus formation 
C) spindle formation 
D) amphimixis and cleavage 
E) formation of blastomeres 
A) oocyte activation 
B) pronucleus formation 
C) spindle formation 
D) amphimixis and cleavage 
E) formation of blastomeres

Question 4

Each of the following statements concerning development is true except

Accepted Answer

A) embryonic development includes the events that occur in the first 2 months. 
B) fetal development occurs from the 9th week until birth. 
C) the first trimester is when the fetus first looks distinctively human. 
D) postnatal development begins at birth. 
E) organ development is complete by the end of the 6th month. 
A) embryonic development includes the events that occur in the first 2 months. 
B) fetal development occurs from the 9th week until birth. 
C) the first trimester is when the fetus first looks distinctively human. 
D) postnatal development begins at birth. 
E) organ development is complete by the end of the 6th month.

Question 5

Why are premenopausal women at lesser risk of atherosclerosis than men?

Accepted Answer

A) Premenopausal women are typically smaller than men reducing the strain on their hearts. 
B) Premenopausal women are typically less active than men reducing their blood pressures. 
C) Premenopausal women have higher estrogen levels that decrease plasma cholesterol. 
D) Premenopausal women eat a better diet than men decreases their plasma cholesterol. 
E) Premenopausal women are typically more active and have better diets than men reducing their plasma cholesterol. 
A) Premenopausal women are typically smaller than men reducing the strain on their hearts. 
B) Premenopausal women are typically less active than men reducing their blood pressures. 
C) Premenopausal women have higher estrogen levels that decrease plasma cholesterol. 
D) Premenopausal women eat a better diet than men decreases their plasma cholesterol. 
E) Premenopausal women are typically more active and have better diets than men reducing their plasma cholesterol.

Question 6

Which chemicals are primarily responsible for initiating contractions of true labor?

Accepted Answer

A) prolactin 
B) progesterone 
C) relaxin and inhibin 
D) estrogens and oxytocin stimulate the production of prostaglandins 
E) LH and oxytocin 
A) prolactin 
B) progesterone 
C) relaxin and inhibin 
D) estrogens and oxytocin stimulate the production of prostaglandins 
E) LH and oxytocin

Question 7

Completion of cytokinesis does not lead to

Accepted Answer

A) production of two blastomeres. 
B) division of the cytoplasm into two portions. 
C) initiation of interphase. 
D) completion of cleavage. 
E) formation of a polar body. 
A) production of two blastomeres. 
B) division of the cytoplasm into two portions. 
C) initiation of interphase. 
D) completion of cleavage. 
E) formation of a polar body.

Question 8

After 3 days,a pre-embryo becomes a solid ball of cells known as a

Accepted Answer

A) chorion. 
B) blastomere. 
C) lacuna. 
D) morula. 
E) blastocyst. 
A) chorion. 
B) blastomere. 
C) lacuna. 
D) morula. 
E) blastocyst.

Question 9

If an individual carries a pair of alleles that are the same,the individual is ________ for the trait.

Accepted Answer

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

Question 10

Differentiate between simple inheritance and polygenic inheritance.

Accepted Answer

A) In simple inheritance,phenotype is determined by a single locus.In polygenic inheritance,phenotype is determined by multiple loci. 
B) In simple inheritance,phenotype is determined by multiple loci.In polygenic inheritance,phenotype is determined by a single locus. 
C) In simple inheritance,phenotype is determined by only one parent.In polygenic inheritance,phenotype is determined by both parents. 
D) In simple inheritance,phenotype is determined by interactions among alleles of several different genes.In polygenic inheritance,phenotype is determined by interactions between a single pair of alleles. 
E) In simple inheritance,phenotype is determined by interactions between a single pair of alleles.In polygenic inheritance,phenotype is determined by interactions among alleles of several different genes. 
A) In simple inheritance,phenotype is determined by a single locus.In polygenic inheritance,phenotype is determined by multiple loci. 
B) In simple inheritance,phenotype is determined by multiple loci.In polygenic inheritance,phenotype is determined by a single locus. 
C) In simple inheritance,phenotype is determined by only one parent.In polygenic inheritance,phenotype is determined by both parents. 
D) In simple inheritance,phenotype is determined by interactions among alleles of several different genes.In polygenic inheritance,phenotype is determined by interactions between a single pair of alleles. 
E) In simple inheritance,phenotype is determined by interactions between a single pair of alleles.In polygenic inheritance,phenotype is determined by interactions among alleles of several different genes.

Question 11

Define organogenesis.

Accepted Answer

A) Organogenesis is the process of cleavage and implantation. 
B) Organogenesis is the process of embryo formation during the first twelve weeks. 
C) Organogenesis is the process of organ formation. 
D) Organogenesis is the process of organ growth during the third trimester. 
E) Organogenesis is the process of organ maturation during postnatal development. 
A) Organogenesis is the process of cleavage and implantation. 
B) Organogenesis is the process of embryo formation during the first twelve weeks. 
C) Organogenesis is the process of organ formation. 
D) Organogenesis is the process of organ growth during the third trimester. 
E) Organogenesis is the process of organ maturation during postnatal development.

Question 12

Deoxygenated blood is carried to the placenta by the

Accepted Answer

A) umbilical vein. 
B) umbilical arteries. 
A) umbilical vein. 
B) umbilical arteries.

Question 13

A person's original chromosomes and their component genes constitute that person's

Accepted Answer

A) autosomal inheritance. 
B) genotype. 
C) phenotype. 
D) allele. 
E) locus. 
A) autosomal inheritance. 
B) genotype. 
C) phenotype. 
D) allele. 
E) locus.

Question 14

Define gestation.

Accepted Answer

A) Gestation is the moment of fertilization. 
B) Gestation is the time after fertilization until implantation. 
C) Gestation is the time of development during the first and second trimesters. 
D) Gestation is the time of development during the third trimester. 
E) Gestation is the time a developing embryo and fetus spends in the uterus. 
A) Gestation is the moment of fertilization. 
B) Gestation is the time after fertilization until implantation. 
C) Gestation is the time of development during the first and second trimesters. 
D) Gestation is the time of development during the third trimester. 
E) Gestation is the time a developing embryo and fetus spends in the uterus.

Question 15

The mesoderm and the cytotrophoblast combine to form the

Accepted Answer

A) amnion. 
B) amniotic sac. 
C) chorion. 
D) allantois. 
E) None of the answers is correct. 
A) amnion. 
B) amniotic sac. 
C) chorion. 
D) allantois. 
E) None of the answers is correct.

Question 16

The hormone that increases the flexibility of the pubic symphysis during pregnancy is

Accepted Answer

A) oxytocin. 
B) progesterone. 
C) human chorionic gonadotropin. 
D) human placental lactogen. 
E) relaxin. 
A) oxytocin. 
B) progesterone. 
C) human chorionic gonadotropin. 
D) human placental lactogen. 
E) relaxin.

Question 17

Distinguish between genotype and phenotype.

Accepted Answer

Chromosomes and their componen

Question 18

Describe the blastocyst and its role in implantation.

Accepted Answer

The blastocyst consists of an outer trop

Question 19

All of the following are true of the allantois except

Accepted Answer

A) it derives partly from endoderm. 
B) it projects into the umbilical stalk. 
C) it derives partly from mesoderm. 
D) part will develop as the urinary bladder. 
E) it acts as the fetal bone marrow. 
A) it derives partly from endoderm. 
B) it projects into the umbilical stalk. 
C) it derives partly from mesoderm. 
D) part will develop as the urinary bladder. 
E) it acts as the fetal bone marrow.

Question 20

The endoderm forms

Accepted Answer

A) muscle. 
B) blood. 
C) neural tissue. 
D) skin. 
E) the urinary bladder. 
A) muscle. 
B) blood. 
C) neural tissue. 
D) skin. 
E) the urinary bladder.

Exam 27: Development and Inheritance

The placenta is not a source of which of the following hormones?

Distinguish among embryonic,fetal,and prenatal development.

Fertilization is complete when which of the follow occurs?

Each of the following statements concerning development is true except

Why are premenopausal women at lesser risk of atherosclerosis than men?

Which chemicals are primarily responsible for initiating contractions of true labor?

Completion of cytokinesis does not lead to

After 3 days,a pre-embryo becomes a solid ball of cells known as a

If an individual carries a pair of alleles that are the same,the individual is ________ for the trait.

Differentiate between simple inheritance and polygenic inheritance.

Define organogenesis.

Deoxygenated blood is carried to the placenta by the

A person's original chromosomes and their component genes constitute that person's

Define gestation.

The mesoderm and the cytotrophoblast combine to form the

The hormone that increases the flexibility of the pubic symphysis during pregnancy is

Distinguish between genotype and phenotype.

Describe the blastocyst and its role in implantation.

All of the following are true of the allantois except

The endoderm forms

An Introduction to Anatomy and Physiology

Chemical Level of Organization

Cellular Level of Organization

Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Skeleton

Joints

Skeletal Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain, cranial Nerves, and Sensory and Motor Pathways

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Heart and Cardiovascular Function

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, nutrition, and Energetics

The Urinary System

Fluid,electrolyte,and Acid-Base Balance

The Reproductive System

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