Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

As it implants,the conceptus is nourished by means of __________.

Accepted Answer

A)  trophoblastic nutrition 
B)  uterine milk 
C)  nutrient diffusion from the endometrium 
D)  placenta 
E)  umbilical nutrition 
A)  trophoblastic nutrition 
B)  uterine milk 
C)  nutrient diffusion from the endometrium 
D)  placenta 
E)  umbilical nutrition

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

The process that makes it possible for sperm to penetrate the egg is called __________.

Accepted Answer

A)  sperm migration 
B)  capacitation 
C)  the cortical reaction 
D)  morulation 
E)  cleavage 
A)  sperm migration 
B)  capacitation 
C)  the cortical reaction 
D)  morulation 
E)  cleavage

Question 5

In the slow block to polyspermy,sperm penetration releases an inflow of __________,which in turn stimulates the __________.

Accepted Answer

A)  Cl-;corona radiata 
B)  K+;zona pellucida 
C)  Na+;fertilization membrane 
D)  Ca2+;fertilization membrane 
E)  Ca2+;cortical reaction 
A)  Cl-;corona radiata 
B)  K+;zona pellucida 
C)  Na+;fertilization membrane 
D)  Ca2+;fertilization membrane 
E)  Ca2+;cortical reaction

Question 6

The optimal "window of opportunity" to conceive a child is __________.

Accepted Answer

A)  a few days before ovulation to less than a day after 
B)  less than a day before ovulation to less than a day after 
C)  a few days before ovulation to a few days after 
D)  a few days before ovulation 
E)  a few days after ovulation 
A)  a few days before ovulation to less than a day after 
B)  less than a day before ovulation to less than a day after 
C)  a few days before ovulation to a few days after 
D)  a few days before ovulation 
E)  a few days after ovulation

Question 7

The observation that there is a limit to how many times a cell can divide is the basis for the __________ theory of senescence.

Accepted Answer

A)  autoimmune 
B)  free radical 
C)  cross-linking 
D)  replicative 
E)  abortive 
A)  autoimmune 
B)  free radical 
C)  cross-linking 
D)  replicative 
E)  abortive

Question 8

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 9

Oxygenated blood reaches the fetus through the __________.

Accepted Answer

A)  umbilical vein 
B)  umbilical arteries 
C)  maternal vein 
D)  maternal arteries 
E)  placental sinus 
A)  umbilical vein 
B)  umbilical arteries 
C)  maternal vein 
D)  maternal arteries 
E)  placental sinus

Question 10

Which of the following is not considered an embryonic membrane?

Accepted Answer

A)  Yolk sac 
B)  Placenta 
C)  Allantois 
D)  Chorion 
E)  Amnion 
A)  Yolk sac 
B)  Placenta 
C)  Allantois 
D)  Chorion 
E)  Amnion

Question 11

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 12

In the blastocyst,the trophoblast will become __________,whereas the embryoblast will become __________.

Accepted Answer

A)  part of the placenta;the yolk sac 
B)  part of the placenta;the embryo 
C)  the embryo;part of the placenta 
D)  the embryo;the yolk sac 
E)  the yolk sac;the embryo 
A)  part of the placenta;the yolk sac 
B)  part of the placenta;the embryo 
C)  the embryo;part of the placenta 
D)  the embryo;the yolk sac 
E)  the yolk sac;the embryo

Question 13

The __________ completely encloses the embryo and provides it with a stable environment.

Accepted Answer

A)  yolk sac 
B)  amnion 
C)  chorion 
D)  chorionic villus 
E)  allantois 
A)  yolk sac 
B)  amnion 
C)  chorion 
D)  chorionic villus 
E)  allantois

Question 14

Which of the following is not a reason muscular weakness tends to develop in old age?

Accepted Answer

A)  Aged muscle has less glycogen,myoglobin,and creatine phosphate. 
B)  There are fewer motor neurons in the spinal cord. 
C)  Aged muscle fibers have fewer myofibrils. 
D)  There are fewer and smaller mitochondria in aged muscle. 
E)  The myocytes of aged muscle no longer synthesize myosin. 
A)  Aged muscle has less glycogen,myoglobin,and creatine phosphate. 
B)  There are fewer motor neurons in the spinal cord. 
C)  Aged muscle fibers have fewer myofibrils. 
D)  There are fewer and smaller mitochondria in aged muscle. 
E)  The myocytes of aged muscle no longer synthesize myosin.

Question 15

Older people may require lower drug doses than younger people because __________.

Accepted Answer

A)  their organs are more sensitive to drugs 
B)  they have lower rates of renal clearance 
C)  they do not absorb as much drug from the small intestine 
D)  there is less tissue mass to treat 
E)  a lifetime of mutations results in unpredictable drug reactions 
A)  their organs are more sensitive to drugs 
B)  they have lower rates of renal clearance 
C)  they do not absorb as much drug from the small intestine 
D)  there is less tissue mass to treat 
E)  a lifetime of mutations results in unpredictable drug reactions

Question 16

During implantation,the trophoblast divides into a deep layer called the _________,which is composed of individual cells.

Accepted Answer

A)  chorion 
B)  amnion 
C)  syncytiotrophoblast 
D)  cytotrophoblast 
E)  embryoblast 
A)  chorion 
B)  amnion 
C)  syncytiotrophoblast 
D)  cytotrophoblast 
E)  embryoblast

Question 17

The most likely outcome of nondisjunction is the production of a gamete receiving __________.

Accepted Answer

A)  no chromosomes 
B)  46 chromosomes 
C)  44 chromosomes 
D)  23 chromosomes 
E)  22 chromosomes 
A)  no chromosomes 
B)  46 chromosomes 
C)  44 chromosomes 
D)  23 chromosomes 
E)  22 chromosomes

Question 18

The fossa ovalis is a remnant of the __________ of the fetus.

Accepted Answer

A)  ductus arteriosus 
B)  ductus venosus 
C)  umbilical artery 
D)  umbilical vein 
E)  foramen ovale 
A)  ductus arteriosus 
B)  ductus venosus 
C)  umbilical artery 
D)  umbilical vein 
E)  foramen ovale

Question 19

Mesenchyme gives rise to __________.

Accepted Answer

A)  nervous tissue 
B)  muscle,bone,and blood 
C)  digestive organs and endocrine glands 
D)  reproductive and urinary systems 
E)  the integumentary system and exocrine glands 
A)  nervous tissue 
B)  muscle,bone,and blood 
C)  digestive organs and endocrine glands 
D)  reproductive and urinary systems 
E)  the integumentary system and exocrine glands

Question 20

The first body cavity is called the __________.

Accepted Answer

A)  coelom 
B)  amniotic cavity 
C)  yolk sac 
D)  somite 
E)  chorion 
A)  coelom 
B)  amniotic cavity 
C)  yolk sac 
D)  somite 
E)  chorion

Exam 29: Human Development and Aging

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

As it implants,the conceptus is nourished by means of __________.

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

The process that makes it possible for sperm to penetrate the egg is called __________.

In the slow block to polyspermy,sperm penetration releases an inflow of __________,which in turn stimulates the __________.

The optimal "window of opportunity" to conceive a child is __________.

The observation that there is a limit to how many times a cell can divide is the basis for the __________ theory of senescence.

Which of the following statements is true regarding telomeres?

Oxygenated blood reaches the fetus through the __________.

Which of the following is not considered an embryonic membrane?

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

In the blastocyst,the trophoblast will become __________,whereas the embryoblast will become __________.

The __________ completely encloses the embryo and provides it with a stable environment.

Which of the following is not a reason muscular weakness tends to develop in old age?

Older people may require lower drug doses than younger people because __________.

During implantation,the trophoblast divides into a deep layer called the _________,which is composed of individual cells.

The most likely outcome of nondisjunction is the production of a gamete receiving __________.

The fossa ovalis is a remnant of the __________ of the fetus.

Mesenchyme gives rise to __________.

The first body cavity is called the __________.

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

Fluid, electrolyte, and Acidbase Balance

The Digestive System

Nutrition and Metabolism

The Male Reproductive System

The Female Reproductive System

Atlas a General Orientation to Human Anatomy

Filters

In the slow block to polyspermy,sperm penetration releases an inflow of ,which in turn stimulates the .

In the blastocyst,the trophoblast will become ,whereas the embryoblast will become .