Question 1

The nervous system is to the ectoderm as the skeleton is to the

Accepted Answer

A) mesoderm. 
B) endoderm. 
C) chorion. 
D) allantois. 
E) blastula. 
A) mesoderm. 
B) endoderm. 
C) chorion. 
D) allantois. 
E) blastula.

Question 2

Which of the following defines "aging"?

Accepted Answer

A) progressive changes from infancy until death 
B) the loss of function of various body systems 
C) the onset of sexual maturity 
D) the development of disease or disability 
E) the failure to thrive 
A) progressive changes from infancy until death 
B) the loss of function of various body systems 
C) the onset of sexual maturity 
D) the development of disease or disability 
E) the failure to thrive

Question 3

Which of the following is not a chief effect of progesterone?

Accepted Answer

A) increased uterine blood flow 
B) relaxation of smooth muscle 
C) reduced uterine motility 
D) reduced maternal immune response to fetus 
E) low blood pressure 
A) increased uterine blood flow 
B) relaxation of smooth muscle 
C) reduced uterine motility 
D) reduced maternal immune response to fetus 
E) low blood pressure

Question 4

During fertilization,several sperm penetrate the corona radiata.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is not involved in the increase in blood volume in a pregnant woman?

Accepted Answer

A) progesterone 
B) artery expansion 
C) renin-angiotensin-aldosterone mechanism 
D) an increase in blood oxygen levels 
E) sodium and water retention 
A) progesterone 
B) artery expansion 
C) renin-angiotensin-aldosterone mechanism 
D) an increase in blood oxygen levels 
E) sodium and water retention

Question 6

Which part of the sperm contains the chromosomes?

Accepted Answer

A) tail 
B) middle piece 
C) head 
D) cell membrane 
E) flagella 
A) tail 
B) middle piece 
C) head 
D) cell membrane 
E) flagella

Question 7

The umbilical arteries carry

Accepted Answer

A) oxygen-rich blood to the developing fetus. 
B) oxygen-rich blood to the placenta. 
C) oxygen-poor blood to the developing fetus. 
D) oxygen-poor blood to the placenta. 
E) oxygen-rich blood to the mother. 
A) oxygen-rich blood to the developing fetus. 
B) oxygen-rich blood to the placenta. 
C) oxygen-poor blood to the developing fetus. 
D) oxygen-poor blood to the placenta. 
E) oxygen-rich blood to the mother.

Question 8

Sheila is experiencing contractions every 15 to 20 minutes that last for 40 seconds or longer.Is she ready to give birth?

Accepted Answer

Yes.This

Question 9

When cells begin to move in the embryo in relation to other cells,this is called

Accepted Answer

A) cleavage. 
B) growth. 
C) morphogenesis. 
D) differentiation. 
E) fertilization. 
A) cleavage. 
B) growth. 
C) morphogenesis. 
D) differentiation. 
E) fertilization.

Question 10

If a fetus contains an X and a Y chromosome but a defective SRY gene,they will develop

Accepted Answer

A) into a female because testosterone is not present. 
B) into a male because testosterone is not present. 
C) into a female because testosterone is present. 
D) into a male because testosterone is present. 
E) into a hermaphrodite due to the presence of estrogen and testosteronE. 
A) into a female because testosterone is not present. 
B) into a male because testosterone is not present. 
C) into a female because testosterone is present. 
D) into a male because testosterone is present. 
E) into a hermaphrodite due to the presence of estrogen and testosteronE.

Question 11

Which of the following is involved in the prevention of polyspermy?

Accepted Answer

A) acrosome of the sperm 
B) depolarization of the egg's plasma membrane 
C) fusion of the sperm and egg nucleus 
D) changes within the corona radiata 
E) the number of chromosomes contained within the sperm 
A) acrosome of the sperm 
B) depolarization of the egg's plasma membrane 
C) fusion of the sperm and egg nucleus 
D) changes within the corona radiata 
E) the number of chromosomes contained within the sperm

Question 12

Summarize the events that occur during each stage of birth.

Accepted Answer

Stage 1 is when the uterine contractions

Question 13

When does the heart begin to develop?

Accepted Answer

A) one week 
B) three weeks 
C) five weeks 
D) seven weeks 
E) nine weeks 
A) one week 
B) three weeks 
C) five weeks 
D) seven weeks 
E) nine weeks

Question 14

The amnion is to the amniotic fluid as the allantois is to the

Accepted Answer

A) blood cell precursors. 
B) chorionic villi. 
C) umbilical blood vessels. 
D) amniotic cavity. 
E) yolk. 
A) blood cell precursors. 
B) chorionic villi. 
C) umbilical blood vessels. 
D) amniotic cavity. 
E) yolk.

Question 15

Which of the following is not true concerning the fetus during the third month of development?

Accepted Answer

A) Bone begins to be replaced with cartilage in certain areas of the skeleton. 
B) The nose,eyes,and ears are present. 
C) Fingernails,nipples,eyelashes,eyebrows,and hair on the head appear. 
D) Head growth slows down as the rest of the body increases in length. 
E) It is possible to distinguish males from females. 
A) Bone begins to be replaced with cartilage in certain areas of the skeleton. 
B) The nose,eyes,and ears are present. 
C) Fingernails,nipples,eyelashes,eyebrows,and hair on the head appear. 
D) Head growth slows down as the rest of the body increases in length. 
E) It is possible to distinguish males from females.

Question 16

The names of the extraembryonic membranes are derived from their function in animals that produce shelled eggs.

Accepted Answer

A) True 
 B)False

Question 17

What occurs during stage 3 of labor?

Accepted Answer

A) The cervix dilates. 
B) The baby is born. 
C) Effacement occurs. 
D) The amniotic sac ruptures. 
E) The placenta is expelled. 
A) The cervix dilates. 
B) The baby is born. 
C) Effacement occurs. 
D) The amniotic sac ruptures. 
E) The placenta is expelled.

Question 18

Estrogen is responsible for the onset and continuation of labor.

Accepted Answer

A) True 
 B)False

Question 19

Few neural cells in the cerebral cortex are lost during the normal aging process.

Accepted Answer

A) True 
 B)False

Question 20

Development ceases at birth.

Accepted Answer

A) True 
 B)False

Exam 18: Development and Aging

The nervous system is to the ectoderm as the skeleton is to the

Which of the following defines "aging"?

Which of the following is not a chief effect of progesterone?

During fertilization,several sperm penetrate the corona radiata.

Which of the following is not involved in the increase in blood volume in a pregnant woman?

Which part of the sperm contains the chromosomes?

The umbilical arteries carry

Sheila is experiencing contractions every 15 to 20 minutes that last for 40 seconds or longer.Is she ready to give birth?

When cells begin to move in the embryo in relation to other cells,this is called

If a fetus contains an X and a Y chromosome but a defective SRY gene,they will develop

Which of the following is involved in the prevention of polyspermy?

Summarize the events that occur during each stage of birth.

When does the heart begin to develop?

The amnion is to the amniotic fluid as the allantois is to the

Which of the following is not true concerning the fetus during the third month of development?

The names of the extraembryonic membranes are derived from their function in animals that produce shelled eggs.

What occurs during stage 3 of labor?

Estrogen is responsible for the onset and continuation of labor.

Few neural cells in the cerebral cortex are lost during the normal aging process.

Development ceases at birth.

Exploring Life and Science

Chemistry of Life

Cell Structure and Function

Organization and Regulation of Body Systems

Cardiovascular System: Heart and Blood Vessels

Cardiovascular System: Blood

The Lymphatic and Immune Systems

Biology of Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

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Muscular System

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Senses

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Patterns of Chromosome Inheritance

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DNA Biology and Technology

Human Evolution

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