Question 1

Which of the following is involved in stimulating milk letdown?

Accepted Answer

A)  increased estrogen levels
B)  increased progesterone levels
C)  mechanical stimulation of the breasts that cause release of oxytocin
D)  secretion of a small amount of milk
E)  None of these choices is correctF) All of the above
G) None of the above

Question 2

As parturition nears,the levels of progesterone ______ and the levels of estrogen ______.

Accepted Answer

A)  decrease; increase
B)  increase; decrease
C)  decrease; decrease
D)  increase; increaseE) B) and C)
F) A) and D)

Question 3

The opening that connects the right and left atria in the fetal heart is the

Accepted Answer

A)  interatrial septum.
B)  septum primum.
C)  septum secundum.
D)  foramen ovale.
E)  foramen rotundum.F) B) and E)
G) A) and B)

Question 4

Fusion of the male and female pronuclei

Accepted Answer

A)  results in an oocyte forming.
B)  restores the diploid number of chromosomes.
C)  occurs before ovulation.
D)  results in a haploid cell forming.
E)  results in a total of 23 chromosomes.F) C) and D)
G) B) and C)

Question 5

Which of the following genotypes will result in a male?

Accepted Answer

A)  XO
B)  XY
C)  XX
D)  XXX
E)  YYF) B) and C)
G) B) and D)

Question 6

Chromosomes that are NOT associated with sex determination are known as

Accepted Answer

A)  structural genes.
B)  autosomes.
C)  genotypes.
D)  polygenic.
E)  y-linked.F) B) and E)
G) B) and C)

Question 7

The inclusion of ______________ in a woman's diet during the early stages of her pregnancy significantly reduces the risk for neural tube defects in her developing embryo.

Accepted Answer

A)  Vitamin E
B)  Vitamin D
C)  Vitamin A
D)  Folic acid
E)  CalciumF) A) and D)
G) C) and D)

Question 8

An embryonic cell that contains the potential to give rise to any tissue type is called a/an

Accepted Answer

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

Question 9

The testes leave the abdominal cavity and reach the scrotum by passing through the

Accepted Answer

A)  urogenital opening.
B)  inguinal canal.
C)  cloaca.
D)  urethra.
E)  Wolffian ducts.F) A) and C)
G) C) and D)

Question 10

The pleural and peritoneal cavities of the adult begin as part of the _____ cavity.

Accepted Answer

A)  cloacal
B)  somatomeric
C)  coelomic
D)  apical
E)  ventralF) A) and B)
G) B) and E)

Question 11

Which germ layer is the brain and spinal cord derived from?

Accepted Answer

A)  ectoderm
B)  mesoderm
C)  endodermD) A) and C)
E) A) and B)

Question 12

Which germ layer is tooth enamel derived from?

Accepted Answer

A)  ectoderm
B)  mesoderm
C)  endodermD) A) and B)
E) A) and C)

Question 13

Which of the following is NOT a possible route for neural crest cells?

Accepted Answer

A)  melanocytes
B)  autonomic ganglion neurons
C)  adrenal cortex
D)  sensory ganglia
E)  enteric nervous system neuronsF) A) and D)
G) A) and C)

Question 14

In males,the urogenital folds close over the urogenital opening and urethral groove to form the

Accepted Answer

A)  scrotum.
B)  testes.
C)  vas deferens.
D)  penis.
E)  prostate gland.F) A) and B)
G) A) and C)

Question 15

The lungs develop from

Accepted Answer

A)  somitomeres.
B)  neural crest cells.
C)  an evagination from the foregut.
D)  an evagination from the floor of the diencephalon.
E)  an invagination from the hindgut.F) A) and C)
G) B) and C)

Question 16

Arm and legs buds appear at about 28 days from

Accepted Answer

A)  the coelom.
B)  apical ectodermal ridges.
C)  somitomeres.
D)  neural crest cells.E) A) and B)
F) B) and C)

Question 17

The earliest period of prenatal development is the _________ period.

Accepted Answer

A)  embryonic
B)  neonatal
C)  germinal
D)  infant
E)  fetalF) D) and E)
G) A) and E)

Question 18

What genetic disorder is caused by having three chromosomes 21?

Accepted Answer

A)  albinism
B)  sickle-cell disease
C)  hemophilia
D)  Down syndrome
E)  achondroplasiaF) A) and B)
G) B) and D)

Question 19

The stage of labor in which the fetus is expelled is

Accepted Answer

A)  the first stage.
B)  the second stage.
C)  the third stage.
D)  the fourth stage.
E)  the fifth stage.F) B) and D)
G) A) and E)

Question 20

Chromosome pairs are called

Accepted Answer

A)  karyotypes.
B)  genomes.
C)  homologous pairs.
D)  loci.
E)  haploid.F) B) and C)
G) A) and D)

Exam 29: Development,growth,aging,and Genetics

Which of the following is involved in stimulating milk letdown?

Correct AnswerverifiedShow Answer

The testes leave the abdominal cavity and reach the scrotum by passing through the

Correct AnswerverifiedShow Answer

The opening that connects the right and left atria in the fetal heart is the

Correct AnswerverifiedShow Answer

Which germ layer is tooth enamel derived from?

Correct AnswerverifiedShow Answer

Arm and legs buds appear at about 28 days from

Correct AnswerverifiedShow Answer

Chromosome pairs are called

Correct AnswerverifiedShow Answer

The earliest period of prenatal development is the _________ period.

Correct AnswerverifiedShow Answer

Chromosomes that are NOT associated with sex determination are known as

Correct AnswerverifiedShow Answer

In males,the urogenital folds close over the urogenital opening and urethral groove to form the

Correct AnswerverifiedShow Answer

The inclusion of ______________ in a woman's diet during the early stages of her pregnancy significantly reduces the risk for neural tube defects in her developing embryo.

Correct AnswerverifiedShow Answer

Fusion of the male and female pronuclei

Correct AnswerverifiedShow Answer

The lungs develop from

Correct AnswerverifiedShow Answer

The pleural and peritoneal cavities of the adult begin as part of the _____ cavity.

Correct AnswerverifiedShow Answer

An embryonic cell that contains the potential to give rise to any tissue type is called a/an

Correct AnswerverifiedShow Answer

The stage of labor in which the fetus is expelled is

Correct AnswerverifiedShow Answer

Which of the following is NOT a possible route for neural crest cells?

Correct AnswerverifiedShow Answer

What genetic disorder is caused by having three chromosomes 21?

Correct AnswerverifiedShow Answer

Which of the following genotypes will result in a male?

Correct AnswerverifiedShow Answer

Which germ layer is the brain and spinal cord derived from?

Correct AnswerverifiedShow Answer

As parturition nears,the levels of progesterone ______ and the levels of estrogen ______.

Correct AnswerverifiedShow Answer

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As parturition nears,the levels of progesterone and the levels of estrogen .

Correct Answer
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