Question 1

The placenta begins to form after week 8.

Accepted Answer

A) True 
 B)False

Question 2

__________ pass(es)from the maternal blood to the fetal blood.Fetal __________ pass(es)the other way.

Accepted Answer

A) Carbon dioxide and oxygen; wastes 
B) Carbon dioxide; nutrients 
C) Wastes; nutrients and oxygen 
D) Wastes and nutrients; oxygen and carbon dioxide 
E) Oxygen and nutrients; wastes 
A) Carbon dioxide and oxygen; wastes 
B) Carbon dioxide; nutrients 
C) Wastes; nutrients and oxygen 
D) Wastes and nutrients; oxygen and carbon dioxide 
E) Oxygen and nutrients; wastes

Question 3

Sperm must travel to the distal end of the uterine tube to encounter the egg before it dies.

Accepted Answer

A) True 
 B)False

Question 4

The spheroidal stage of early prenatal development with about 16 to 64 cells is called a(n)__________.

Accepted Answer

A) zygote 
B) embryo 
C) blastomere 
D) morula 
E) blastocyst 
A) zygote 
B) embryo 
C) blastomere 
D) morula 
E) blastocyst

Question 5

The chorion forms the fetal part of the placenta.

Accepted Answer

A) True 
 B)False

Question 6

Cleavage results in daughter cells containing half the number of chromosomes of the parent cell.

Accepted Answer

A) True 
 B)False

Question 7

By the time the conceptus arrives in the uterus,it consists of at least __________ or more cells.

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 16 
E) 32 
A) 2 
B) 4 
C) 8 
D) 16 
E) 32

Question 8

The __________ is an embryonic membrane that serves as the origin of the first blood and germ cells.

Accepted Answer

A) yolk sac 
B) allantois 
C) chorion 
D) amnion 
E) placenta 
A) yolk sac 
B) allantois 
C) chorion 
D) amnion 
E) placenta

Question 9

To some extent,the heat loss of the neonate is compensated for by the thermal insulation provided by brown fat.

Accepted Answer

A) True 
 B)False

Question 10

Twins produced when a single egg is fertilized are called __________ twins.Twins produced from two eggs ovulated at the same time are called __________ twins.

Accepted Answer

A) monozygotic; identical 
B) dizygotic; nonidentical 
C) monozygotic; dizygotic 
D) dizygotic; monozygotic 
E) nonidentical; identical 
A) monozygotic; identical 
B) dizygotic; nonidentical 
C) monozygotic; dizygotic 
D) dizygotic; monozygotic 
E) nonidentical; identical

Question 11

A person in his or her 90's can increase muscle strength by two or three times with 40 minutes of isometric exercise per week.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following systems shows the least overall senescence?

Accepted Answer

A) Muscular system 
B) Endocrine system 
C) Integumentary system 
D) Reproductive system 
E) Urinary system 
A) Muscular system 
B) Endocrine system 
C) Integumentary system 
D) Reproductive system 
E) Urinary system

Question 13

Which of the following does not have potentially teratogenic effects?

Accepted Answer

A) Smoking 
B) Alcohol 
C) Infectious diseases 
D) Sunlight 
E) X-rays 
A) Smoking 
B) Alcohol 
C) Infectious diseases 
D) Sunlight 
E) X-rays

Question 14

The embryonic stage extends from 16 days through the end of week 8.

Accepted Answer

A) True 
 B)False

Question 15

In the fast block to polyspermy,binding of sperm opens up __________ channels,which depolarizes the egg membrane and __________.

Accepted Answer

A) Na+; prevents the entrance of any more sperm 
B) Na+; prevents the entrance of more Na+ 
C) Na+; prevents the entrance of Ca2+ 
D) Ca2+; prevents the entrance of any more sperm 
E) Ca2+; prevents the entrance of more Na+ 
A) Na+; prevents the entrance of any more sperm 
B) Na+; prevents the entrance of more Na+ 
C) Na+; prevents the entrance of Ca2+ 
D) Ca2+; prevents the entrance of any more sperm 
E) Ca2+; prevents the entrance of more Na+

Question 16

Which of the following is not a known benefit of regular exercise?

Accepted Answer

A) Maintained joint mobility 
B) Maintained strength 
C) Decreased incidence of hypertension 
D) Maintained endurance 
E) Prolonged life expectancy 
A) Maintained joint mobility 
B) Maintained strength 
C) Decreased incidence of hypertension 
D) Maintained endurance 
E) Prolonged life expectancy

Question 17

Senescence of the immune system makes older people more susceptible to cancer and infectious disease because of a decline in __________.

Accepted Answer

A) alpha and beta globulins 
B) red blood cells and platelets 
C) complement proteins 
D) prothrombin and fibrinogen 
E) antigen-presenting cells and helper T cells 
A) alpha and beta globulins 
B) red blood cells and platelets 
C) complement proteins 
D) prothrombin and fibrinogen 
E) antigen-presenting cells and helper T cells

Question 18

During birth,an infant is normally stimulated to breathe by __________.

Accepted Answer

A) CO2 accumulating in the baby's blood 
B) an increased O2 level in the baby's new environment 
C) prostaglandins 
D) surfactant 
E) being spanked by the doctor 
A) CO2 accumulating in the baby's blood 
B) an increased O2 level in the baby's new environment 
C) prostaglandins 
D) surfactant 
E) being spanked by the doctor

Question 19

Which of the following statements is true regarding telomeres?

Accepted Answer

A) Telomeres are cytoplasmic enzymes involved in senescence. 
B) Telomeres are antioxidants that slow the progress of senescence. 
C) Telomeres are DNA segments at each end of a chromosome. 
D) Telomeres are proteins that cap the ends of the chromosomes. 
E) Telomeres are motor molecules that guide embryonic cells to the right destinations. 
A) Telomeres are cytoplasmic enzymes involved in senescence. 
B) Telomeres are antioxidants that slow the progress of senescence. 
C) Telomeres are DNA segments at each end of a chromosome. 
D) Telomeres are proteins that cap the ends of the chromosomes. 
E) Telomeres are motor molecules that guide embryonic cells to the right destinations.

Question 20

Down syndrome (trisomy-21)results from _________.

Accepted Answer

A) a mutagen 
B) nondisjunction 
C) a teratogen 
D) a sex-linked mutation 
E) an autosomal recessive allele 
A) a mutagen 
B) nondisjunction 
C) a teratogen 
D) a sex-linked mutation 
E) an autosomal recessive allele

Exam 29: Human Development and Aging

The placenta begins to form after week 8.

__________ pass(es)from the maternal blood to the fetal blood.Fetal __________ pass(es)the other way.

Sperm must travel to the distal end of the uterine tube to encounter the egg before it dies.

The spheroidal stage of early prenatal development with about 16 to 64 cells is called a(n)__________.

The chorion forms the fetal part of the placenta.

Cleavage results in daughter cells containing half the number of chromosomes of the parent cell.

By the time the conceptus arrives in the uterus,it consists of at least __________ or more cells.

The __________ is an embryonic membrane that serves as the origin of the first blood and germ cells.

To some extent,the heat loss of the neonate is compensated for by the thermal insulation provided by brown fat.

Twins produced when a single egg is fertilized are called __________ twins.Twins produced from two eggs ovulated at the same time are called __________ twins.

A person in his or her 90's can increase muscle strength by two or three times with 40 minutes of isometric exercise per week.

Which of the following systems shows the least overall senescence?

Which of the following does not have potentially teratogenic effects?

The embryonic stage extends from 16 days through the end of week 8.

In the fast block to polyspermy,binding of sperm opens up __________ channels,which depolarizes the egg membrane and __________.

Which of the following is not a known benefit of regular exercise?

Senescence of the immune system makes older people more susceptible to cancer and infectious disease because of a decline in __________.

During birth,an infant is normally stimulated to breathe by __________.

Which of the following statements is true regarding telomeres?

Down syndrome (trisomy-21)results from _________.

Major Themes of Anatomy and Physiology

The Chemistry of Life

Cellular Form and Function

Genetics of Cellular Function

Histology

The Integumentary System

Bone Tissue

The Skeletal System

Joints

The Muscular System

Muscular Tissue

Nervous Tissue

The Spinal Cord, spinal Nerves, and Somatic Reflexes

The Brain and Cranial Nerves

The Autonomic Nervous System and Visceral Reflexes

Sense Organs

The Endocrine System

The Circulatory System: Blood

The Circulatory System: Heart

The Circulatory System: Blood Vessels and Circulation

The Lymphatic and Immune Systems

The Respiratory System

The Urinary System

Water,Electrolyte,and Acid-Base Balance

The Digestive System

Nutrition and Metabolism

The Male Reproductive System

The Female Reproductive System

General Orientation to Human Anatomy

Filters

pass(es)from the maternal blood to the fetal blood.Fetal pass(es)the other way.

Twins produced when a single egg is fertilized are called twins.Twins produced from two eggs ovulated at the same time are called twins.

In the fast block to polyspermy,binding of sperm opens up channels,which depolarizes the egg membrane and .