Question 1

The yolk stalk and body stalk fuse during week five, forming the

Accepted Answer

A) amnion. 
B) allantois. 
C) chorion. 
D) umbilical stalk. 
E) primitive streak. 
A) amnion. 
B) allantois. 
C) chorion. 
D) umbilical stalk. 
E) primitive streak.

Question 2

The most common viable chromosome abnormality is

Accepted Answer

A) Fragile-X syndrome. 
B) Trisomy 21. 
C) Turner's syndrome. 
D) Klinefelter's syndrome. 
E) a translocation defect. 
A) Fragile-X syndrome. 
B) Trisomy 21. 
C) Turner's syndrome. 
D) Klinefelter's syndrome. 
E) a translocation defect.

Question 3

During implantation,

Accepted Answer

A) the syncytial trophoblast erodes a path through the uterine epithelium. 
B) the inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) the entire trophoblast becomes syncytial. 
E) the inner cell mass is temporarily deprived of nutrients. 
A) the syncytial trophoblast erodes a path through the uterine epithelium. 
B) the inner cell mass begins to form the placenta. 
C) maternal blood vessels in the endometrium are walled off from the blastocyst. 
D) the entire trophoblast becomes syncytial. 
E) the inner cell mass is temporarily deprived of nutrients.

Question 4

Neural tube formation occurs during which gestational age?

Accepted Answer

A) 4 months 
B) 2 weeks 
C) 1 month 
D) 9 weeks 
E) 5 months 
A) 4 months 
B) 2 weeks 
C) 1 month 
D) 9 weeks 
E) 5 months

Question 5

When the alleles of a gene are both expressed equally, the alleles show a form of inheritance called

Accepted Answer

A) codominance. 
B) polygenic inheritance. 
C) recessive inheritance. 
D) sex linkage. 
E) heterozygosity. 
A) codominance. 
B) polygenic inheritance. 
C) recessive inheritance. 
D) sex linkage. 
E) heterozygosity.

Question 6

Choose the correct statement regarding neonates.

Accepted Answer

A) Urinary water losses are low. 
B) The digestive system is extremely active before birth. 
C) Neonatal respiratory rates are considerably lower than those of adults. 
D) Typical neonatal heart rates are lower than fetal heart rates. 
E) At birth, the lungs are fully expanded and filled with fluid. 
A) Urinary water losses are low. 
B) The digestive system is extremely active before birth. 
C) Neonatal respiratory rates are considerably lower than those of adults. 
D) Typical neonatal heart rates are lower than fetal heart rates. 
E) At birth, the lungs are fully expanded and filled with fluid.

Question 7

Regarding lactation and the mammary glands, which statement is true?

Accepted Answer

A) Colostrum contains more proteins than breast milk. 
B) An expectant mother's mammary glands begin producing colostrum by the end of the second month of pregnancy. 
C) As colostrum production increases, the mammary glands convert to milk production. 
D) Colostrum, unlike milk, contains large quantities of lysozymes. 
E) Colostrum has much more fat than breast milk. 
A) Colostrum contains more proteins than breast milk. 
B) An expectant mother's mammary glands begin producing colostrum by the end of the second month of pregnancy. 
C) As colostrum production increases, the mammary glands convert to milk production. 
D) Colostrum, unlike milk, contains large quantities of lysozymes. 
E) Colostrum has much more fat than breast milk.

Question 8

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label E represents which of the following structures?

Accepted Answer

A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) syncytial trophoblast 
E) cellular trophoblast 
A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) syncytial trophoblast 
E) cellular trophoblast

Question 9

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label H represents which of the following structures?

Accepted Answer

A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) blastocoel 
E) lacuna 
A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) blastocoel 
E) lacuna

Question 10

Which of the following forms when blood vessels form in the chorion, around the periphery of the blastocyst?

Accepted Answer

A) allantois 
B) placenta 
C) blastocoele 
D) amnion 
E) trophoblast 
A) allantois 
B) placenta 
C) blastocoele 
D) amnion 
E) trophoblast

Question 11

What must be present for albinism to occur?

Accepted Answer

A) heterozygosity 
B) two dominant alleles 
C) sex-linked alleles 
D) two recessive alleles 
E) polygenic alleles 
A) heterozygosity 
B) two dominant alleles 
C) sex-linked alleles 
D) two recessive alleles 
E) polygenic alleles

Question 12

The ectoderm forms which of the following?

Accepted Answer

A) muscle 
B) all lymphatic structures 
C) the cardiovascular system 
D) the thymus, thyroid gland, and pancreas 
E) all neural tissues 
A) muscle 
B) all lymphatic structures 
C) the cardiovascular system 
D) the thymus, thyroid gland, and pancreas 
E) all neural tissues

Question 13

The study of the development of the human organism during the first two months after fertilization is called

Accepted Answer

A) genetics. 
B) embryology. 
C) pediatrics. 
D) anthropology. 
E) gerontology. 
A) genetics. 
B) embryology. 
C) pediatrics. 
D) anthropology. 
E) gerontology.

Question 14

In humans, the 22 pairs of chromosomes, which contain most of the genes that affect somatic characteristics such as hair color and skin pigmentation, are called

Accepted Answer

A) alleles. 
B) heterozygous chromosomes. 
C) homologous chromosomes. 
D) autosomal chromosomes. 
E) homozygous chromosomes. 
A) alleles. 
B) heterozygous chromosomes. 
C) homologous chromosomes. 
D) autosomal chromosomes. 
E) homozygous chromosomes.

Question 15

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label G represents which of the following structures?

Accepted Answer

A) syncytial trophoblast 
B) developing villi 
C) lacuna 
D) uterine gland 
E) amniotic cavity 
A) syncytial trophoblast 
B) developing villi 
C) lacuna 
D) uterine gland 
E) amniotic cavity

Question 16

When labor begins, the fetal pituitary gland secretes ________, which may be the actual trigger for the onset of labor.

Accepted Answer

A) prolactin 
B) hCG 
C) oxytocin 
D) growth hormone 
E) thyroxine 
A) prolactin 
B) hCG 
C) oxytocin 
D) growth hormone 
E) thyroxine

Question 17

During pregnancy,

Accepted Answer

A) maternal respiratory rate decreases. 
B) maternal blood volume decreases. 
C) maternal nutrient requirements decrease significantly. 
D) a woman's glomerular filtration rate decreases by 20 percent. 
E) maternal tidal volume increases. 
A) maternal respiratory rate decreases. 
B) maternal blood volume decreases. 
C) maternal nutrient requirements decrease significantly. 
D) a woman's glomerular filtration rate decreases by 20 percent. 
E) maternal tidal volume increases.

Question 18

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label B represents which of the following structures?

Accepted Answer

A) blastocoele 
B) blastocyst 
C) trophoblast 
D) developing villi 
E) chorion 
A) blastocoele 
B) blastocyst 
C) trophoblast 
D) developing villi 
E) chorion

Question 19

Paired chromosomes are called

Accepted Answer

A) homologous chromosomes. 
B) autosomal chromosomes. 
C) homozygous chromosomes. 
D) heterozygous chromosomes. 
E) alleles. 
A) homologous chromosomes. 
B) autosomal chromosomes. 
C) homozygous chromosomes. 
D) heterozygous chromosomes. 
E) alleles.

Question 20

Figure 20-1 Events in Implantation
Use Figure 20-1 to identify the labeled part.
-Label F represents which of the following structures?

Accepted Answer

A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) syncytial trophoblast 
E) cellular trophoblast 
A) blastocyst 
B) inner cell mass 
C) trophoblast 
D) syncytial trophoblast 
E) cellular trophoblast

The yolk stalk and body stalk fuse during week five, forming the

The most common viable chromosome abnormality is

During implantation,

Neural tube formation occurs during which gestational age?

When the alleles of a gene are both expressed equally, the alleles show a form of inheritance called

Choose the correct statement regarding neonates.

Regarding lactation and the mammary glands, which statement is true?

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label E represents which of the following structures?

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label H represents which of the following structures?

Which of the following forms when blood vessels form in the chorion, around the periphery of the blastocyst?

What must be present for albinism to occur?

The ectoderm forms which of the following?

The study of the development of the human organism during the first two months after fertilization is called

In humans, the 22 pairs of chromosomes, which contain most of the genes that affect somatic characteristics such as hair color and skin pigmentation, are called

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label G represents which of the following structures?

When labor begins, the fetal pituitary gland secretes ________, which may be the actual trigger for the onset of labor.

During pregnancy,

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label B represents which of the following structures?

Paired chromosomes are called

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label F represents which of the following structures?

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

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Exam 20: Development and Inheritance

The yolk stalk and body stalk fuse during week five, forming the

The most common viable chromosome abnormality is

During implantation,

Neural tube formation occurs during which gestational age?

When the alleles of a gene are both expressed equally, the alleles show a form of inheritance called

Choose the correct statement regarding neonates.

Regarding lactation and the mammary glands, which statement is true?

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label E represents which of the following structures?

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label H represents which of the following structures?

Which of the following forms when blood vessels form in the chorion, around the periphery of the blastocyst?

What must be present for albinism to occur?

The ectoderm forms which of the following?

The study of the development of the human organism during the first two months after fertilization is called

In humans, the 22 pairs of chromosomes, which contain most of the genes that affect somatic characteristics such as hair color and skin pigmentation, are called

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label G represents which of the following structures?

When labor begins, the fetal pituitary gland secretes ________, which may be the actual trigger for the onset of labor.

During pregnancy,

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label B represents which of the following structures?

Paired chromosomes are called

Figure 20-1 Events in Implantation Use Figure 20-1 to identify the labeled part. -Label F represents which of the following structures?

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

Filters