Question 1

The placenta,a vitally important metabolic organ,is made up of a contribution from mother and fetus.Which portion is from the fetus?

Accepted Answer

A)  yolk sac
B)  umbilicus
C)  chorion
D)  amnion

Question 2

When do we begin to call the developing individual a fetus rather than an embryo?

Accepted Answer

We begin to call the...

Question 3

How are the metabolic needs of the implanted embryo provided for?

Accepted Answer

Initially,the implanted embryo obtains n...

Question 4

The placenta and its attached fetal membranes are collectively called the afterbirth.

Accepted Answer

A) True 
 B)False

Question 5

A friend confides that she desires to have children but is having trouble conceiving.Which of the following is true regarding implantation?

Accepted Answer

A)  An estimated 60% of implanted embryos later miscarry due to genetic defects of the embryo.
B)  Detection of human chorionic gonadotropin (hCG) in blood or urine indicates failure of the blastocyst to implant.
C)  It is estimated that a minimum of two-thirds of all zygotes formed fail to implant by the end of the first week or spontaneously abort.
D)  In cases where implantation fails to occur,a nonreceptive uterus becomes receptive once again.

Question 6

The patient is in her first trimester of pregnancy.She complains of feeling nauseated and has vomited on occasion.She tells the nurse that she did not have this with her first pregnancy.She asks the nurse,"What is causing this and when will it end?" How should the nurse respond?

Accepted Answer

The nurse should explain that nausea is ...

Question 7

Derivatives of the mesoderm include ________.

Accepted Answer

A)  glandular derivatives of the digestive tract
B)  vertebrae and ribs
C)  all nervous tissue
D)  epithelium of the digestive tract

Question 8

At what time in the pregnancy is the placenta fully prepared to fulfill the needs of the developing fetus?

Accepted Answer

The placenta is fully formed a...

Question 9

By the end of the embryonic period,at 8 weeks,all the adult organ systems are recognizable.

Accepted Answer

A) True 
 B)False

Question 10

Briefly describe the events leading to the implantation of the blastocyst in the uterus,including how it is nourished.

Accepted Answer

The blastocyst floats freely in the uter...

Question 11

Freshly deposited sperm are not immediately capable of penetrating an oocyte.

Accepted Answer

A) True 
 B)False

Question 12

Thalidomide was once used to treat intense nausea and morning sickness in pregnant women.Unfortunately,if administered at certain points during gestation it resulted in limb malformation.This drug is an example of a(n) ________.

Accepted Answer

A)  endocrine disruptor
B)  carcinogen
C)  teratogen
D)  neurotoxin

Question 13

An episiotomy is an incision made to widen the vaginal orifice,aiding fetal expulsion.

Accepted Answer

A) True 
 B)False

Question 14

A urine test reveals a positive result for human chorionic gonadotropin (hCG) .This indicates ________ was successful.

Accepted Answer

A)  gastrulation
B)  fertilization
C)  ovulation
D)  implantation

Question 15

Which of the following is NOT a correct matching of a fetal structure with what it becomes at birth?

Accepted Answer

A)  foramen ovale fossa ovalis
B)  ductus venosus ligamentum venosum
C)  ductus arteriosus ligamentum teres
D)  umbilical arteries medial umbilical ligaments

Question 16

The cardiovascular system of a newborn must be adjusted after the infant takes its first breath.Which of the following is also true?

Accepted Answer

A)  The ductus arteriosus constricts and is converted to the ligamentum arteriosum.
B)  The urinary system is activated at birth.
C)  The foramen ovale between the atria of the fetal heart closes at the moment of birth.
D)  The ductus venosus is disconnected at the severing of the umbilical cord and all visceral blood goes into the vena cava.

Question 17

Which of the following is NOT assessed as part of the Apgar score?

Accepted Answer

A)  temperature
B)  muscle tone
C)  respiration
D)  heart rate

Question 18

Which of the following is NOT a primary germ layer?

Accepted Answer

A)  epiderm
B)  endoderm
C)  mesoderm
D)  ectoderm

Question 19

Relaxin is a hormone produced by the placenta and ovaries.The function of this hormone is to ________.

Accepted Answer

A)  ensure the implantation of the blastula
B)  block the pain of childbirth
C)  prevent morning sickness
D)  relax the pubic symphysis

Question 20

The correct sequence of preembryonic structures is ________.

Accepted Answer

A)  blastocyst,morula,zygote
B)  zygote,blastocyst,morula
C)  zygote,morula,blastocyst
D)  morula,zygote,blastocyst

Exam 28: Pregnancy and Human Development

Relaxin is a hormone produced by the placenta and ovaries.The function of this hormone is to ________.

Correct AnswerverifiedShow Answer

Briefly describe the events leading to the implantation of the blastocyst in the uterus,including how it is nourished.

Correct AnswerverifiedThe blastocyst floats freely in the uter...View AnswerShow Answer

Freshly deposited sperm are not immediately capable of penetrating an oocyte.

Correct AnswerverifiedShow Answer

The placenta,a vitally important metabolic organ,is made up of a contribution from mother and fetus.Which portion is from the fetus?

Correct AnswerverifiedShow Answer

The patient is in her first trimester of pregnancy.She complains of feeling nauseated and has vomited on occasion.She tells the nurse that she did not have this with her first pregnancy.She asks the nurse,"What is causing this and when will it end?" How should the nurse respond?

Correct AnswerverifiedThe nurse should explain that nausea is ...View AnswerShow Answer

Derivatives of the mesoderm include ________.

Correct AnswerverifiedShow Answer

How are the metabolic needs of the implanted embryo provided for?

Correct AnswerverifiedInitially,the implanted embryo obtains n...View AnswerShow Answer

Which of the following is NOT a primary germ layer?

Correct AnswerverifiedShow Answer

The correct sequence of preembryonic structures is ________.

Correct AnswerverifiedShow Answer

A urine test reveals a positive result for human chorionic gonadotropin (hCG) .This indicates ________ was successful.

Correct AnswerverifiedShow Answer

The cardiovascular system of a newborn must be adjusted after the infant takes its first breath.Which of the following is also true?

Correct AnswerverifiedShow Answer

A friend confides that she desires to have children but is having trouble conceiving.Which of the following is true regarding implantation?

Correct AnswerverifiedShow Answer

An episiotomy is an incision made to widen the vaginal orifice,aiding fetal expulsion.

Correct AnswerverifiedShow Answer

By the end of the embryonic period,at 8 weeks,all the adult organ systems are recognizable.

Correct AnswerverifiedShow Answer

Which of the following is NOT a correct matching of a fetal structure with what it becomes at birth?

Correct AnswerverifiedShow Answer

Thalidomide was once used to treat intense nausea and morning sickness in pregnant women.Unfortunately,if administered at certain points during gestation it resulted in limb malformation.This drug is an example of a(n) ________.

Correct AnswerverifiedShow Answer

When do we begin to call the developing individual a fetus rather than an embryo?

Correct AnswerverifiedWe begin to call the...View AnswerShow Answer

The placenta and its attached fetal membranes are collectively called the afterbirth.

Correct AnswerverifiedShow Answer

Which of the following is NOT assessed as part of the Apgar score?

Correct AnswerverifiedShow Answer

At what time in the pregnancy is the placenta fully prepared to fulfill the needs of the developing fetus?

Correct AnswerverifiedThe placenta is fully formed a...View AnswerShow Answer

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The blastocyst floats freely in the uter...
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The nurse should explain that nausea is ...
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Initially,the implanted embryo obtains n...
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We begin to call the...
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The placenta is fully formed a...
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