Question 1

The maturation that occurs within the pre-embryonic and embryonic periods is known as __________.

Accepted Answer

The answer of The maturation that occurs within the pre-embryonic...

Question 2

A trait is said to exhibit ____________ dominance when the phenotype of a heterozygous individual is intermediate between the phenotypes of individuals who are homozygous dominant and individuals who are homozygous recessive.

Accepted Answer

The answer of A trait is said to exhibit ____________...

Question 3

In pregnant women,the high levels of estrogen and progesterone secretion seem to lead to

Accepted Answer

A)  stronger nails and fuller hair.
B)  weaker nails and thinner hair.C) A) and B)
D) undefined

Question 4

Braxton-Hicks contractions tend to be

Accepted Answer

A)  regular and increasingly frequent as time passes.
B)  increasingly intense as time passes.
C)  irregularly spaced and do not become more frequent as time passes.
D)  regular in timing but relatively weak.E) A) and B)
F) All of the above C

Question 5

What is the correct order of structures through which the sperm penetrates during fertilization

Accepted Answer

A)  Corona radiata,oocyte plasma membrane,zona pellucida
B)  Zona pellucida,corona radiata,oocyte plasma membrane
C)  Corona radiata,zona pellucida,oocyte plasma membrane
D)  Zona pellucida,oocyte plasma membrane,corona radiataE) None of the above
F) All of the above

Question 6

Polyspermy results in the production of monozygotic twins.

Accepted Answer

A) True 
 B)False

Question 7

The beginning of labor involves increased production of ________ from the fetal hypothalamus,resulting in secretion of _________ by the placenta.

Accepted Answer

A)  GnRH;prolactin
B)  prolactin;oxytocin
C)  oxytocin;prostaglandins
D)  prostaglandin;prolactin
E)  prolactin;GnRHF) C) and D)
G) A) and B)

Question 8

Human chorionic gonadotropin is secreted from cells of the

Accepted Answer

A)  morula.
B)  embryoblast.
C)  syncytiotrophoblast.
D)  zygote.E) B) and C)
F) C) and D)

Question 9

When pregnant,a woman has an increased sensitivity to the hormone angiotensin.

Accepted Answer

A) True 
 B)False

Question 10

Implantation usually begins at about the end of the first ________ of development.

Accepted Answer

A)  day
B)  week
C)  month
D)  trimesterE) A) and C)
F) C) and D) B

Question 11

After ovulation,the oocyte

Accepted Answer

A)  waits passively for a sperm to penetrate.
B)  releases negative ions that create an electrical gradient that all sperm swim toward.
C)  releases chemotaxic signals to attract sperm to its location.
D)  propels itself toward seminal fluid by calcium-dependent kinesis.E) B) and C)
F) A) and D)

Question 12

When epiblast cells travel through the primitive streak and underneath the epiblast layer,that movement is described as

Accepted Answer

A)  capacitation.
B)  invagination.
C)  chemotaxation.
D)  cleavage.E) A) and D)
F) B) and C)

Question 13

The structure of the mesoderm that induces formation of the neural tube is the

Accepted Answer

A)  head mesenchyme.
B)  amnion.
C)  notochord.
D)  paraxial mesoderm.E) C) and D)
F) None of the above C

Question 14

Approximately when in development does the bilaminar germinal disc begins to form

Accepted Answer

A)  Day 8
B)  Day 32
C)  Week 8
D)  Week 24E) None of the above
F) C) and D)

Question 15

During the dilation stage,the cervix expands and becomes thinner.This stage ends once the cervix has fully dilated and ________ (thinned).

Accepted Answer

The answer of During the dilation stage,the cervix expands and...

Question 16

The pre-embryonic period ends when

Accepted Answer

A)  a morula is formed.
B)  the zygote undergoes cleavage.
C)  the blastocyst implants in the uterus.
D)  the morula develops a trophoblast.E) All of the above
F) C) and D)

Question 17

Capacitation lasts several ________ and involves removal of ___________.

Accepted Answer

A)  seconds;lipids from the surface of the egg
B)  hours;proteins from the surface of the sperm
C)  days;carbohydrates from the surface of the egg
D)  weeks;glycolipids from the surface of the spermE) None of the above
F) A) and B)

Question 18

Blocklike masses that form from paraxial mesoderm and develop into muscle,axial skeleton,cartilage,and dermis are known as __________.

Accepted Answer

The answer of Blocklike masses that form from paraxial mesoderm...

Question 19

Cells within the embryoblast have the ability to differentiate into any type of cell within the body.

Accepted Answer

A) True 
 B)False

Question 20

Breastfeeding prolongs the duration of time it takes for the uterus to shrink to its pre-pregnancy size.

Accepted Answer

A) True 
 B)False

Exam 29: Development,Pregnancy,and Heredity

The maturation that occurs within the pre-embryonic and embryonic periods is known as __________.

Correct AnswerverifiedShow Answer

A trait is said to exhibit ____________ dominance when the phenotype of a heterozygous individual is intermediate between the phenotypes of individuals who are homozygous dominant and individuals who are homozygous recessive.

Correct AnswerverifiedShow Answer

In pregnant women,the high levels of estrogen and progesterone secretion seem to lead to

Correct AnswerverifiedShow Answer

Braxton-Hicks contractions tend to be

Correct AnswerverifiedC

What is the correct order of structures through which the sperm penetrates during fertilization

Correct AnswerverifiedShow Answer

Polyspermy results in the production of monozygotic twins.

Correct AnswerverifiedShow Answer

The beginning of labor involves increased production of ________ from the fetal hypothalamus,resulting in secretion of _________ by the placenta.

Correct AnswerverifiedShow Answer

Human chorionic gonadotropin is secreted from cells of the

Correct AnswerverifiedShow Answer

When pregnant,a woman has an increased sensitivity to the hormone angiotensin.

Correct AnswerverifiedShow Answer

Implantation usually begins at about the end of the first ________ of development.

Correct AnswerverifiedB

After ovulation,the oocyte

Correct AnswerverifiedShow Answer

When epiblast cells travel through the primitive streak and underneath the epiblast layer,that movement is described as

Correct AnswerverifiedShow Answer

The structure of the mesoderm that induces formation of the neural tube is the

Correct AnswerverifiedC

Approximately when in development does the bilaminar germinal disc begins to form

Correct AnswerverifiedShow Answer

During the dilation stage,the cervix expands and becomes thinner.This stage ends once the cervix has fully dilated and ________ (thinned).

Correct AnswerverifiedShow Answer

The pre-embryonic period ends when

Correct AnswerverifiedShow Answer

Capacitation lasts several ________ and involves removal of ___________.

Correct AnswerverifiedShow Answer

Blocklike masses that form from paraxial mesoderm and develop into muscle,axial skeleton,cartilage,and dermis are known as __________.

Correct AnswerverifiedShow Answer

Cells within the embryoblast have the ability to differentiate into any type of cell within the body.

Correct AnswerverifiedShow Answer

Breastfeeding prolongs the duration of time it takes for the uterus to shrink to its pre-pregnancy size.

Correct AnswerverifiedShow Answer

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C

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The beginning of labor involves increased production of from the fetal hypothalamus,resulting in secretion of _ by the placenta.

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B

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C

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Capacitation lasts several and involves removal of ___.

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