Question 1

Fertilization is generally considered complete when the

Accepted Answer

A)  zygote enters the uterus. 
B)  sperm reaches the zona pellucida. 
C)  ovulation is inhibited. 
D)  placenta begins to form. 
E)  haploid sperm unites with the mature ovum. 
A)  zygote enters the uterus. 
B)  sperm reaches the zona pellucida. 
C)  ovulation is inhibited. 
D)  placenta begins to form. 
E)  haploid sperm unites with the mature ovum.

Question 2

The muscles and nervous system of the fetus become mature enough for movement to occur by the ________ month of development.

Accepted Answer

A)  fifth 
B)  first 
C)  eighth 
D)  third 
E)  seventh 
A)  fifth 
B)  first 
C)  eighth 
D)  third 
E)  seventh

Question 3

The placenta is detached from the uterus during which one of the following stages of labor?

Accepted Answer

A)  placental 
B)  dilation 
C)  secretory 
D)  expulsion 
E)  afterbirth 
A)  placental 
B)  dilation 
C)  secretory 
D)  expulsion 
E)  afterbirth

Question 4

The placenta forms from embryonic tissue and

Accepted Answer

A)  bone marrow. 
B)  amniotic fluid. 
C)  the embryonic disk. 
D)  endometrium. 
E)  the yolk sac. 
A)  bone marrow. 
B)  amniotic fluid. 
C)  the embryonic disk. 
D)  endometrium. 
E)  the yolk sac.

Question 5

Labor is a highly coordinated event that requires the participation of numerous signaling molecules. Discuss how hormones help coordinate the events of labor to ensure that a child is delivered quickly.

Accepted Answer

Several hormones are involved in the pro

Question 6

The process by which the blastocyst becomes buried within the endometrial lining of the uterus is called

Accepted Answer

A)  fertilization. 
B)  implantation. 
C)  morphogenesis. 
D)  differentiation. 
E)  embryonic development. 
A)  fertilization. 
B)  implantation. 
C)  morphogenesis. 
D)  differentiation. 
E)  embryonic development.

Question 7

Which one of the following statements about gender determination is TRUE?

Accepted Answer

A)  The male gender is determined by the presence of only one X chromosome. 
B)  The male gender is determined by the presence of a Y chromosome. 
C)  The hormones estrogen and progesterone are key players in the development of internal and external female genitalia. 
D)  The development of male genitalia is the "default" condition in the absence of estrogen. 
E)  The development of female genitalia is activated by the presence of anti-Mullerian hormone. 
A)  The male gender is determined by the presence of only one X chromosome. 
B)  The male gender is determined by the presence of a Y chromosome. 
C)  The hormones estrogen and progesterone are key players in the development of internal and external female genitalia. 
D)  The development of male genitalia is the "default" condition in the absence of estrogen. 
E)  The development of female genitalia is activated by the presence of anti-Mullerian hormone.

Question 8

What marks the end of the pre-embryonic period and the beginning of the embryonic period?

Accepted Answer

A)  implantation 
B)  the formation of the ectoderm and endoderm in the embryonic disk 
C)  the formation of the morula 
D)  the formation of the blastocyst 
E)  the formation of pharyngeal arches 
A)  implantation 
B)  the formation of the ectoderm and endoderm in the embryonic disk 
C)  the formation of the morula 
D)  the formation of the blastocyst 
E)  the formation of pharyngeal arches

Question 9

There are a series of cell divisions that produce no cell growth during the first four days following fertilization. This process is referred to as

Accepted Answer

A)  cleavage. 
B)  conceptus. 
C)  morphogenesis. 
D)  implantation. 
E)  differentiation. 
A)  cleavage. 
B)  conceptus. 
C)  morphogenesis. 
D)  implantation. 
E)  differentiation.

Question 10

The cell formed by the union of egg and sperm during fertilization is the ________.

Accepted Answer

The answer of The cell formed by the union of...

Question 11

Which organ system is not functional until birth and must become fully functional immediately?

Accepted Answer

A)  excretory system (kidneys) 
B)  respiratory system 
C)  cardiovascular system 
D)  muscular system 
E)  skeletal system 
A)  excretory system (kidneys) 
B)  respiratory system 
C)  cardiovascular system 
D)  muscular system 
E)  skeletal system

Question 12

The formation of the ________ cavity and the differentiation of the embryonic disk into ectoderm and endoderm occurs at the end of the pre-embryonic period of development.

Accepted Answer

The answer of The formation of the ________ cavity and...

Question 13

Most sperm cells die in the vagina when entering the female's body because

Accepted Answer

A)  the sperm cannot pass through the mucus. 
B)  the female's reproductive tract is protected by digestive enzymes. 
C)  of the low pH of the vagina. 
D)  the sperm cells have not yet been activated to swim. 
E)  macrophages from the female's immune system destroy all nonself cells. 
A)  the sperm cannot pass through the mucus. 
B)  the female's reproductive tract is protected by digestive enzymes. 
C)  of the low pH of the vagina. 
D)  the sperm cells have not yet been activated to swim. 
E)  macrophages from the female's immune system destroy all nonself cells.

Question 14

Fertilization is completed when the sperm nucleus fuses with the ________.

Accepted Answer

The answer of Fertilization is completed when the sperm nucleus...

Question 15

The increase in life expectancy in the United States in the last 100 years is mainly due to healthier lifestyles slowing the process of ageing.

Accepted Answer

A) True 
 B)False

Question 16

In the prenatal diagnostic technique amniocentesis,

Accepted Answer

A)  a needle is inserted into the umbilical cord to collect fetal blood for screening. 
B)  a thin, flexible tube connected to a needle is inserted through the vagina and into the uterus to collect a tissue sample. 
C)  fetal blood is collected directly from the chorionic villi near the cervix. 
D)  a needle is inserted through the abdominal wall to collect amniotic fluid containing fetal cells. 
E)  the procedure cannot be performed after the fifteenth week of gestation. 
A)  a needle is inserted into the umbilical cord to collect fetal blood for screening. 
B)  a thin, flexible tube connected to a needle is inserted through the vagina and into the uterus to collect a tissue sample. 
C)  fetal blood is collected directly from the chorionic villi near the cervix. 
D)  a needle is inserted through the abdominal wall to collect amniotic fluid containing fetal cells. 
E)  the procedure cannot be performed after the fifteenth week of gestation.

Question 17

An ________ pregnancy is one where the blastocyst implants somewhere outside of the uterus, such as in the oviduct.

Accepted Answer

The answer of An ________ pregnancy is one where the...

Question 18

During the development following fertilization, the morula becomes a hollow ball of cells called the

Accepted Answer

A)  conceptus. 
B)  fetus. 
C)  germ layer. 
D)  blastocyst. 
E)  secondary morula. 
A)  conceptus. 
B)  fetus. 
C)  germ layer. 
D)  blastocyst. 
E)  secondary morula.

Question 19

When a sperm cell enters a secondary oocyte, what event in the oocyte is immediately triggered?

Accepted Answer

A)  cytokinesis 
B)  mitosis 
C)  meiosis I 
D)  meiosis II 
E)  ovulation 
A)  cytokinesis 
B)  mitosis 
C)  meiosis I 
D)  meiosis II 
E)  ovulation

Question 20

Match each organ to the germ layer from which it develops. Answers may be used more than once.
A) endoderm
B) ctoderm
C) ectoderm
D) mesoderm
-bone marrow

Accepted Answer

The answer of Match each organ to the germ layer...

Exam 21: Development and Aging

Fertilization is generally considered complete when the

The muscles and nervous system of the fetus become mature enough for movement to occur by the ________ month of development.

The placenta is detached from the uterus during which one of the following stages of labor?

The placenta forms from embryonic tissue and

Labor is a highly coordinated event that requires the participation of numerous signaling molecules. Discuss how hormones help coordinate the events of labor to ensure that a child is delivered quickly.

The process by which the blastocyst becomes buried within the endometrial lining of the uterus is called

Which one of the following statements about gender determination is TRUE?

What marks the end of the pre-embryonic period and the beginning of the embryonic period?

There are a series of cell divisions that produce no cell growth during the first four days following fertilization. This process is referred to as

The cell formed by the union of egg and sperm during fertilization is the ________.

Which organ system is not functional until birth and must become fully functional immediately?

The formation of the ________ cavity and the differentiation of the embryonic disk into ectoderm and endoderm occurs at the end of the pre-embryonic period of development.

Most sperm cells die in the vagina when entering the female's body because

Fertilization is completed when the sperm nucleus fuses with the ________.

The increase in life expectancy in the United States in the last 100 years is mainly due to healthier lifestyles slowing the process of ageing.

In the prenatal diagnostic technique amniocentesis,

An ________ pregnancy is one where the blastocyst implants somewhere outside of the uterus, such as in the oviduct.

During the development following fertilization, the morula becomes a hollow ball of cells called the

When a sperm cell enters a secondary oocyte, what event in the oocyte is immediately triggered?

Match each organ to the germ layer from which it develops. Answers may be used more than once. A) endoderm B) ctoderm C) ectoderm D) mesoderm -bone marrow

Human Biology, Science, and Society

The Chemistry of Living Things

Structure and Function of Cells

From Cells to Organ Systems

The Skeletal System

The Muscular System

Blood

Heart and Blood Vessels

The Immune System and Mechanisms of Defense

The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

The Endocrine System

The Digestive System and Nutrition

The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

Evolution and the Origins of Life

Ecosystems and Populations

Human Impacts, Biodiversity, and Environmental Issues

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