Question 1

Which of the following is not true about age related issues?

Accepted Answer

A)   Neurons are extremely sensitive to oxygen deficiency so loss of brain function may occur to narrowing of the blood vessels rather than aging.
B)   With age, some sensory receptors require more stimulation to function at the same level as before.
C)   Strength in the muscles that control breathing may be lost leading to breathing difficulties.
D)   Osteoporosis, the loss of bone density, cannot be prevented and all women will suffer from it to some degree.
E)   All of these are true.F) B) and C)
G) A) and E)

Question 2

A homeotic gene codes for a(n) ____ protein,a sequence of 60 amino acids,sets of which determine the genes to be turned on during development.

Accepted Answer

A)   induction
B)   morphogenesis
C)   growth
D)   regulatory
E)   homeodomainF) A) and B)
G) None of the above

Question 3

Which part of the blastocyst will develop into the human embryo?

Accepted Answer

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

Question 4

In order to provide for easier birth,a newborn baby has membranous areas of skull called

Accepted Answer

A)   oval windows.
B)   bursa.
C)   sutures.
D)   septa.
E)   fontanels.F) C) and E)
G) All of the above

Question 5

A pregnancy test is based on the production of ___ by the ____.

Accepted Answer

A)   FSH; anterior pituitary
B)   estrogen; ovary
C)   progesterone; corpus luteum
D)   hCG; trophoblast
E)   GnRH; hypothalamusF) C) and D)
G) A) and B)

Question 6

Which of the following hormones causes the uterus to contract?

Accepted Answer

A)   oxytocin
B)   estrogen
C)   progesterone
D)   testosterone
E)   prolactinF) A) and C)
G) C) and E)

Question 7

Morphogenesis is

Accepted Answer

A)   the total life cycle of any animal.
B)   a process by which tissues are shaped into organs.
C)   the mechanism by which gametes are formed.
D)   a study of the beginning and ending of life.
E)   the study of aging.F) A) and D)
G) D) and E)

Question 8

Another term for programmed cell death is

Accepted Answer

A)   morphogenesis.
B)   apoptosis.
C)   pattern formation.
D)   cellular differentiation.
E)   mitosis.F) D) and E)
G) A) and E) B

Question 9

A failure of the cells in the ectoderm to differentiate correctly would most affect which of the following body systems?

Accepted Answer

A)   cardiovascular system
B)   urinary system
C)   digestive system
D)   urinary system.
E)   nervous systemF) All of the above
G) B) and C)

Question 10

Free radicals,unpaired electrons,can cause aging because

Accepted Answer

A)   They collect in the organs and skin forming large molecules that interfere with organ function.
B)   They bond with molecules that are nearby, like DNA and proteins, causing damage to the molecule.
C)   Unpaired electrons pair up together and attack DNA.
D)   Free radicals seek to free other electrons so that all electrons are stripped from DNA.
E)   They speed up metabolic processes causing the organs to wear out faster.F) None of the above
G) B) and D)

Question 11

______ is the parceling out of maternal determinants as mitosis occurs in embryonic cells.

Accepted Answer

A)   Homeostasis
B)   Induction
C)   Morphogenesis
D)   Cytoplasmic segregation
E)   AgingF) None of the above
G) D) and E)

Question 12

Which of the following serves as an insulator for the embryo?

Accepted Answer

A)   amniotic fluid
B)   allantois
C)   chorion
D)   primitive streak
E)   yolk sacF) A) and E)
G) C) and E)

Question 13

During gastrulation in vertebrates,the pore created by invagination will become the

Accepted Answer

A)   brain.
B)   heart.
C)   mouth.
D)   anus.
E)   ear.F) D) and E)
G) B) and C)

Question 14

The placenta develops from

Accepted Answer

A)   fetal membranes only.
B)   maternal tissue only.
C)   both fetal and maternal tissue.
D)   separate polar bodies that develop just the placental tissues.
E)   from the yolk sac.F) B) and E)
G) A) and E) C

Question 15

Which of the following does not occur during the process of fertilization?

Accepted Answer

A)   The sperm cell releases acrosomal enzymes.
B)   The sperm cell enters the egg and the nucleus is released.
C)   The nucleus of the sperm and egg cell fuse.
D)   The plasma membrane of the sperm head and egg fuse.
E)   The tail bores a hole in the zona pellucida which the head then penetrates.F) A) and D)
G) A) and E)

Question 16

The presence of the same homeotic genes in a wide range of organisms for producing set patterns is an indication that

Accepted Answer

A)   evolution solved certain developmental problems just once.
B)   all organisms are composed of exactly the same proteins.
C)   the same homeotic mutations are likely to appear in all organisms.
D)   essentially we can complete the genome mapping of all animals in a short time.
E)   structures remain fairly constant, but regulation of animal development varies widely across the kingdom.F) C) and E)
G) A) and B)

Question 17

After milk production begins,it continues as long as the baby suckles but ends otherwise.This maintenance is provided by nervous stimulation sent to the ____ which eventually causes production of ____.

Accepted Answer

A)   ovaries; prolactin
B)   pituitary; prolactin
C)   hypothalamus; oxytocin
D)   ovaries; oxytocin
E)   uterus; estrogenF) A) and C)
G) All of the above

Question 18

The ______ in fetal circulation allows blood from the right atrium to directly enter the left atrium.

Accepted Answer

A)   umbilical cord
B)   arterial duct
C)   foramen ovale
D)   venous duct
E)   right ventricleF) A) and B)
G) A) and C)

Question 19

How does a sperm penetrate an egg?

Accepted Answer

A)   Enzymes in the acrosome dissolve the zona pellucida.
B)   The sperm melts its way inside using the nucleic acids in its DNA.
C)   The forward pressure of the flagellum forces it through the plasma membrane.
D)   Spermatids are wedge-shaped and are chemically attracted to the inside cytoplasm of the egg cell.
E)   The haploid sets of chromosomes match across the membrane and this triggers the membrane to dissolve.F) A) and E)
G) B) and D)

Question 20

Researchers have discovered _____ that determine the pattern of an animal and its individual parts.

Accepted Answer

A)   embryonic signposts
B)   morphogen genes
C)   cytoplasmic segregation routes
D)   induction genes
E)   fate mapsF) B) and C)
G) A) and B) B

Exam 22: Development and Aging

Which of the following is not true about age related issues?

Correct AnswerverifiedShow Answer

A homeotic gene codes for a(n) ____ protein,a sequence of 60 amino acids,sets of which determine the genes to be turned on during development.

Correct AnswerverifiedShow Answer

Which part of the blastocyst will develop into the human embryo?

Correct AnswerverifiedShow Answer

In order to provide for easier birth,a newborn baby has membranous areas of skull called

Correct AnswerverifiedShow Answer

A pregnancy test is based on the production of ___ by the ____.

Correct AnswerverifiedShow Answer

Which of the following hormones causes the uterus to contract?

Correct AnswerverifiedShow Answer

Morphogenesis is

Correct AnswerverifiedShow Answer

Another term for programmed cell death is

Correct AnswerverifiedB

A failure of the cells in the ectoderm to differentiate correctly would most affect which of the following body systems?

Correct AnswerverifiedShow Answer

Free radicals,unpaired electrons,can cause aging because

Correct AnswerverifiedShow Answer

______ is the parceling out of maternal determinants as mitosis occurs in embryonic cells.

Correct AnswerverifiedShow Answer

Which of the following serves as an insulator for the embryo?

Correct AnswerverifiedShow Answer

During gastrulation in vertebrates,the pore created by invagination will become the

Correct AnswerverifiedShow Answer

The placenta develops from

Correct AnswerverifiedC

Which of the following does not occur during the process of fertilization?

Correct AnswerverifiedShow Answer

The presence of the same homeotic genes in a wide range of organisms for producing set patterns is an indication that

Correct AnswerverifiedShow Answer

After milk production begins,it continues as long as the baby suckles but ends otherwise.This maintenance is provided by nervous stimulation sent to the ____ which eventually causes production of ____.

Correct AnswerverifiedShow Answer

The ______ in fetal circulation allows blood from the right atrium to directly enter the left atrium.

Correct AnswerverifiedShow Answer

How does a sperm penetrate an egg?

Correct AnswerverifiedShow Answer

Researchers have discovered _____ that determine the pattern of an animal and its individual parts.

Correct AnswerverifiedB

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A pregnancy test is based on the production of _ by the __.

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B

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C

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After milk production begins,it continues as long as the baby suckles but ends otherwise.This maintenance is provided by nervous stimulation sent to the which eventually causes production of .

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B