Question 1

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Accepted Answer

A) True 
 B)False

Question 2

The preprogrammed theory of aging supports all of the following except

Accepted Answer

A)  there is a genetic influence on aging.
B)  mutations that decrease the activity of a hormone receptor contribute to a longer lifespan.
C)  the accumulation of harmful DNA mutants builds up over time.
D)  longevity tends to run in families.
E)  identical twins have a similar life span.F) A) and B)
G) A) and E)

Question 3

The proper order of embryonic development is

Accepted Answer

A)  cleavage-morula-blastula-gastrula.
B)  morula-cleavage-blastula-gastrula.
C)  blastula-cleavage-morula-gastrula.
D)  gastrula-cleavage-blastula-morula.E) C) and D)
F) A) and D)

Question 4

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Accepted Answer

A)  archenteron
B)  blastopore
C)  chorion
D)  trophoblast
E)  inner cell massF) A) and B)
G) D) and E)

Question 5

A series of events occur during fertilization.Place the following events in the proper order in which they occur.a) The "slowblock" occurs.b) A single nuclear envelope surrounds both sperm and egg pronuclei.c) The acrosomes of sperm release digestive enzymes that allow the sperm to pass through the zona pellucida to the egg plasma membrane.d) Sperm cover the surface of the egg and secrete enzymes that help weaken the corona radiata.e) Pronuclei are formed.f) The "fast block" occurs.g) Microvilli bring the entire sperm into the egg.h) Sperm squeeze through the corona radiata and bind to the zona pellucida.

Accepted Answer

A)  a,e,b,d,f,c,g,h
B)  d,h,c,f,a,g,e,b
C)  d,b,g,a,f,c,e,h
D)  f,a,d,h,c,g,e,b
E)  e,d,h,c,a,f,b,gF) A) and B)
G) C) and D)

Question 6

During the formation of an embryo,the hollow ball of cells having a fluid-filled cavity is called a

Accepted Answer

A)  morula.
B)  blastula.
C)  blastocoel.
D)  gastrula.
E)  neurula.F) A) and B)
G) D) and E)

Question 7

Development of the neural system is characterized by

Accepted Answer

A)  cell division and growth in size.
B)  cells becoming specialized in structure and function.
C)  body parts being shaped and patterned into a specific form.
D)  All of the choices are correct.
E)  None of the choices are correct.F) A) and E)
G) A) and D)

Question 8

As we age we tend to see a decrease in the function of various body systems.A decrease in which system will lead to problems in regulating our temperature?

Accepted Answer

A)  integumentary system
B)  cardiovascular system
C)  digestive system
D)  respiratory system
E)  excretory systemF) C) and E)
G) C) and D)

Question 9

Which stage would show the development of the ectoderm and endoderm germ layers?

Accepted Answer

A)  early gastrulation
B)  neurulation
C)  blastulation
D)  late gastrulationE) A) and B)
F) A) and C)

Question 10

The phenomenon of apoptosis or cell death,as it relates to morphogenesis in Drosphila melanogaster,

Accepted Answer

A)  is a mechanism present in every cell that occurs when an inhibitory protein is inactivated.
B)  occurs when the cellular machinery simply wears out and the cell dies from being unable to continue vital processes.
C)  occurs when the ability of the cell to repair DNA mutations finally fails.
D)  is a disease phenomenon and cell death is always a bad trait.
E)  is not yet understood but probably involves the failure of the homeobox to correctly control development.F) A) and B)
G) B) and D)

Question 11

One of the earliest indications of cell differentiation is cellular movement.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following statements about embryonic development is NOT true?

Accepted Answer

A)  A blastopore is the opening into the primitive gut formed by gastrulation.
B)  A blastocoel is the fluid-filled cavity of a blastula.
C)  A primitive gut is also referred to as an archenteron.
D)  The primitive streak occurs in the morula stage of the embryonic development.
E)  A zygote undergoes cleavage,which increases the cell number,but not the volume of the egg cytoplasm.F) A) and E)
G) A) and C)

Question 13

What statement about homeotic genes,as it relates to morphogenesis inDrosophila ,is NOT true?

Accepted Answer

A)  Homeotic genes are found in many different organisms.
B)  Homeotic genes code for translational factors that bind to mRNA.
C)  Each homeotic gene has a variable region and a sequence called the homeobox.
D)  The homeobox codes for a homeodomain which is the DNA-binding portion of the transcriptional factor.
E)  All homeotic genes are thought to be derived from an original DNA sequence that has been highly conserved in evolution.F) All of the above
G) A) and E)

Question 14

Which system develops first in the embryo?

Accepted Answer

A)  reproductive
B)  circulatory
C)  nervous
D)  respiratory
E)  excretoryF) A) and C)
G) A) and B)

Question 15

When discussing the morphogenesis of Drosophila melanogaster,homeotic gene codes for

Accepted Answer

A)  proteins that bind to regulatory regions of DNA.
B)  proteins that determine anteroposterior polarity.
C)  proteins that determine which genes are turned on.
D)  proteins that bind to regulatory regions of DNA and proteins that determine which genes are turned on.
E)  All of the choices are correct.F) A) and E)
G) All of the above

Question 16

Which of the following is the organ of exchange between the mother and fetus?

Accepted Answer

A)  chorion
B)  amnion
C)  placenta
D)  yolk sac
E)  allantoisF) C) and D)
G) A) and C)

Question 17

What is the correct series of events during parturition? 
A.The amnion breaks.
B.The cervix dilates.
C.ACTH causes the adrenal cortex to release androgens into the bloodstream.
D.Prostaglandins and oxytocin are produced.
E.The baby is born and the umbilical cord is cut.
F.The placenta is delivered.

Accepted Answer

A)  c - d - b - a - e - f
B)  c - d - a -b - e - f
C)  a - d - b - c - e - f
D)  c - d - b - f - a - e
E)  c - b - f - a - e - dF) B) and E)
G) C) and D)

Question 18

Generally,only one sperm fertilizes an egg because

Accepted Answer

A)  sperm are so few that two are unlikely to arrive at the same time.
B)  sperm compete against one another before entering,and only the most fit one is accepted.
C)  one small entry hole called the blastopore allows only one sperm to fit through and then seals.
D)  many sperm enter but only one set of chromosomes can fuse with the egg nucleus; the other sperm are absorbed.
E)  when the first sperm membrane fuses with the egg membrane,it forms a fertilization membrane,which forms a barrier to the penetration of other sperm.F) C) and E)
G) C) and D)

Question 19

In what process does a fertilized egg undergo cell division without further growth?

Accepted Answer

A)  cleavage
B)  gastrulation
C)  differentiation
D)  morphogenesis
E)  implantationF) A) and B)
G) A) and C)

Question 20

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Accepted Answer

A)  A diet that consists of dark green vegetables,nuts and red wine.
B)  A diet that has a high level of cholesterol.
C)  A moderate exercise program.
D)  All of these will help slow the aging process.
E)  None of these will help slow the aging process.F) B) and E)
G) All of the above

Exam 42: Animal Development

In what process does a fertilized egg undergo cell division without further growth?

Correct Answer
verified

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Correct Answer
verified

The preprogrammed theory of aging supports all of the following except

Correct Answer
verified

The proper order of embryonic development is

Correct Answer
verified

One of the earliest indications of cell differentiation is cellular movement.

Correct Answer
verified

When discussing the morphogenesis of Drosophila melanogaster,homeotic gene codes for

Correct Answer
verified

Which stage would show the development of the ectoderm and endoderm germ layers?

Correct Answer
verified

Which system develops first in the embryo?

Correct Answer
verified

Correct Answer
verified

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Correct Answer
verified

Development of the neural system is characterized by

Correct Answer
verified

As we age we tend to see a decrease in the function of various body systems.A decrease in which system will lead to problems in regulating our temperature?

Correct Answer
verified

What statement about homeotic genes,as it relates to morphogenesis inDrosophila ,is NOT true?

Correct Answer
verified

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Correct Answer
verified

Which of the following statements about embryonic development is NOT true?

Correct Answer
verified

What is the correct series of events during parturition? A.The amnion breaks. B.The cervix dilates. C.ACTH causes the adrenal cortex to release androgens into the bloodstream. D.Prostaglandins and oxytocin are produced. E.The baby is born and the umbilical cord is cut. F.The placenta is delivered.

Correct Answer
verified

Generally,only one sperm fertilizes an egg because

Correct Answer
verified

The phenomenon of apoptosis or cell death,as it relates to morphogenesis in Drosphila melanogaster,

Correct Answer
verified

Which of the following is the organ of exchange between the mother and fetus?

Correct Answer
verified

During the formation of an embryo,the hollow ball of cells having a fluid-filled cavity is called a

Correct Answer
verified

Exam 42: Animal Development

In what process does a fertilized egg undergo cell division without further growth?

Correct AnswerverifiedShow Answer

Which of the following practices is believed to help the most with slowing the damage accumulation aging process?

Correct AnswerverifiedShow Answer

The preprogrammed theory of aging supports all of the following except

Correct AnswerverifiedShow Answer

The proper order of embryonic development is

Correct AnswerverifiedShow Answer

One of the earliest indications of cell differentiation is cellular movement.

Correct AnswerverifiedShow Answer

When discussing the morphogenesis of Drosophila melanogaster,homeotic gene codes for

Correct AnswerverifiedShow Answer

Which stage would show the development of the ectoderm and endoderm germ layers?

Correct AnswerverifiedShow Answer

Which system develops first in the embryo?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What part of the blastocyst will develop into the human embryo and eventually into a fetus?

Correct AnswerverifiedShow Answer

Development of the neural system is characterized by

Correct AnswerverifiedShow Answer

As we age we tend to see a decrease in the function of various body systems.A decrease in which system will lead to problems in regulating our temperature?

Correct AnswerverifiedShow Answer

What statement about homeotic genes,as it relates to morphogenesis inDrosophila ,is NOT true?

Correct AnswerverifiedShow Answer

A decrease in the function of the cardiovascular system due to aging can cause a decreased ability of the body to metabolize drugs.

Correct AnswerverifiedShow Answer

Which of the following statements about embryonic development is NOT true?

Correct AnswerverifiedShow Answer

What is the correct series of events during parturition? A.The amnion breaks. B.The cervix dilates. C.ACTH causes the adrenal cortex to release androgens into the bloodstream. D.Prostaglandins and oxytocin are produced. E.The baby is born and the umbilical cord is cut. F.The placenta is delivered.

Correct AnswerverifiedShow Answer

Generally,only one sperm fertilizes an egg because

Correct AnswerverifiedShow Answer

The phenomenon of apoptosis or cell death,as it relates to morphogenesis in Drosphila melanogaster,

Correct AnswerverifiedShow Answer

Which of the following is the organ of exchange between the mother and fetus?

Correct AnswerverifiedShow Answer

During the formation of an embryo,the hollow ball of cells having a fluid-filled cavity is called a

Correct AnswerverifiedShow Answer

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