Question 1

Which of the following fetal shunts bypasses the fetal lungs?

Accepted Answer

A)  ductus arteriosus
B)  ductus venosus
C)  umbilical arteries
D)  umbilical vein
E)  ductus byosusF) A) and B)
G) B) and D)

Question 2

The process of meiosis will _____ as the gametes are produced.

Accepted Answer

A)  cut the chromosome number by 1/3
B)  cut the chromosome number by 1/2
C)  double the chromosome number
D)  not change the chromosome number
E)  triple the chromosome numberF) A) and E)
G) A) and C)

Question 3

Where does implantation normally occur?

Accepted Answer

A)  in the fundus area of the uterus
B)  in the isthmus area of the uterine tube
C)  in the cervix area of the uterus
D)  in the infundibulum area of the uterine tubeE) B) and C)
F) A) and B)

Question 4

The clinical age of the unborn child is calculated from

Accepted Answer

A)  ovulation.
B)  conception.
C)  the last menstrual period.
D)  fourteen days after the last menstrual period.
E)  fourteen days before the last menstrual period.F) A) and C)
G) None of the above

Question 5

The genotype WW is best described as

Accepted Answer

A)  homozygous recessive.
B)  homozygous dominant.
C)  heterozygous dominant.
D)  heterozygous recessive.
E)  homorecessive.F) D) and E)
G) C) and D)

Question 6

Which of the following events near the end of pregnancy might indicate parturition is near?

Accepted Answer

A)  The cervix gradually constricts.
B)  The uterus begins regular contractions.
C)  The amniotic sac becomes edematous.
D)  The fetal heart rate increases to greater than 160 beats per minute.
E)  The cervix shrinks.F) C) and D)
G) A) and C)

Question 7

Developmental events are calculated from

Accepted Answer

A)  ovulation.
B)  conception.
C)  the last menstrual period.
D)  fourteen days after the last menstrual period.
E)  fourteen days before the last menstrual period.F) A) and D)
G) C) and E)

Question 8

Some epiblast cells migrate and emerge between the epiblast and endoderm as a new germ layer called the

Accepted Answer

A)  yolk sac.
B)  mesoglia.
C)  notochord.
D)  mesoderm.
E)  primitive streak.F) None of the above
G) A) and B)

Question 9

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin  α\alphaα  6 β\betaβ 1.This is called the

Accepted Answer

A)  slow block to polyspermy.
B)  acrosomal reaction.
C)  fast block to polyspermy.
D)  fertilization.
E)  spermiogenesis. F) B) and E)
G) B) and D)

Question 10

Puberty in females occurs _____ than in males.

Accepted Answer

A)  earlier
B)  later
C)  at the same timeD) All of the above
E) B) and C)

Question 11

An embryonic cell that has the potential to develop into a wide range of tissues is called a/an

Accepted Answer

A)  differentiated cell.
B)  multipotent cell.
C)  pluripotent cell.
D)  omnipotent cell.
E)  totipotent cell.F) C) and D)
G) B) and E)

Question 12

Which of the following statements concerning the embryonic circulatory system is true?

Accepted Answer

A)  The heart develops from four endothelial tubes.
B)  Blood vessels form from blood islands.
C)  An opening in the interatrial septum is called the sinus venosus.
D)  The bulbus cordis becomes the sinoatrial node (the adult pacemaker) .
E)  There is an opening in the interventricular septum.F) A) and B)
G) A) and C)

Question 13

Which of the following is derived from endoderm?

Accepted Answer

A)  brain
B)  muscle
C)  epidermis of the skin
D)  lining of the digestive tract
E)  cardiovascular systemF) A) and C)
G) C) and D)

Question 14

The prenatal period during which the major organ systems form is the

Accepted Answer

A)  fetal period.
B)  germinal period.
C)  embryonic period.
D)  neonatal period.E) C) and D)
F) B) and C)

Question 15

The chorionic villi

Accepted Answer

A)  form from branches of the syncytiotrophoblast cords.
B)  increase surface area of the amniotic cavity.
C)  contribute to the formation of the placenta.
D)  are necessary for implantation to occur.
E)  are not part of the placental formation.F) A) and C)
G) C) and E)

Question 16

Germ layers form during the ____ period while organ systems mature during the ____ period.

Accepted Answer

A)  embryonic; fetal
B)  prenatal; neonatal
C)  germinal; embryonic
D)  germinal; fetal
E)  fetal; germinalF) C) and E)
G) A) and C)

Question 17

Fine,soft hair that covers the fetus is called

Accepted Answer

A)  lanugo.
B)  fetal hair.
C)  colostrum.
D)  vernix caseosa.
E)  primary hair.F) C) and D)
G) None of the above

Question 18

In fetal circulation,the blood containing the highest amount of oxygen is found in the

Accepted Answer

A)  aorta.
B)  umbilical vein.
C)  ductus arteriosus.
D)  umbilical arteries.
E)  heart.F) A) and B)
G) A) and C)

Question 19

Which of the following statements concerning musculoskeletal system development is true?

Accepted Answer

A)  Skeletal muscles develop from crest cells.
B)  Myoblasts produce somites.
C)  The vertebral column develops from somite-derived mesoderm.
D)  Enlargement of muscles after birth is due to an increase in the number of muscle fibers.
E)  Ossification ends before birth.F) C) and D)
G) A) and D)

Question 20

The major difference between an embryo and a fetus is that

Accepted Answer

A)  a fetus can survive outside the mother's womb but an embryo cannot.
B)  a fetus is smaller than an embryo.
C)  organ systems are developing in an embryo while all organs are present in a fetus.
D)  a fetus is a male child while an embryo is a female child.
E)  None of these choices is correct.F) A) and B)
G) A) and E)

Exam 29: Development,growth,aging,and Genetics

The clinical age of the unborn child is calculated from

Correct AnswerverifiedShow Answer

The process of meiosis will _____ as the gametes are produced.

Correct AnswerverifiedShow Answer

Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin α\alphaα 6 β\betaβ 1.This is called the

Correct AnswerverifiedShow Answer

Which of the following statements concerning musculoskeletal system development is true?

Correct AnswerverifiedShow Answer

Germ layers form during the ____ period while organ systems mature during the ____ period.

Correct AnswerverifiedShow Answer

The chorionic villi

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The prenatal period during which the major organ systems form is the

Correct AnswerverifiedShow Answer

Some epiblast cells migrate and emerge between the epiblast and endoderm as a new germ layer called the

Correct AnswerverifiedShow Answer

Which of the following is derived from endoderm?

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Where does implantation normally occur?

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Developmental events are calculated from

Correct AnswerverifiedShow Answer

The genotype WW is best described as

Correct AnswerverifiedShow Answer

The major difference between an embryo and a fetus is that

Correct AnswerverifiedShow Answer

In fetal circulation,the blood containing the highest amount of oxygen is found in the

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Which of the following fetal shunts bypasses the fetal lungs?

Correct AnswerverifiedShow Answer

An embryonic cell that has the potential to develop into a wide range of tissues is called a/an

Correct AnswerverifiedShow Answer

Which of the following statements concerning the embryonic circulatory system is true?

Correct AnswerverifiedShow Answer

Which of the following events near the end of pregnancy might indicate parturition is near?

Correct AnswerverifiedShow Answer

Puberty in females occurs _____ than in males.

Correct AnswerverifiedShow Answer

Fine,soft hair that covers the fetus is called

Correct AnswerverifiedShow Answer

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Depolarization of the oocyte plasma membrane occurs when the first sperm attaches to the integrin $\alpha$ 6 $\beta$ 1.This is called the

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Germ layers form during the period while organ systems mature during the period.

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