Question 1

The embryonic heart

Accepted Answer

A)  develops from two endothelial tubes that fuse together.
B)  consists of four chambers.
C)  has two atria but only one ventricle.
D)  doesn't beat until just prior to birth.
E)  has no passages connecting right side to left side.F) A) and E)
G) A) and C)

Question 2

Which of the following characterizes the developmental age of an eight month old infant?

Accepted Answer

A)  sits without support
B)  rolls from its back to its side
C)  smiles in response to people's faces
D)  pulls itself up to a standing position
E)  None of these choices is correctF) B) and E)
G) B) and C)

Question 3

The waxy coat of sloughed epithelial cells that covers the fetus is called

Accepted Answer

A)  lanugo.
B)  fetal hair.
C)  colostrum.
D)  vernix caseosa.
E)  primary hair.F) All of the above
G) B) and E)

Question 4

The inner cell mass of the blastocyst

Accepted Answer

A)  consists of yolk-filled storage cells.
B)  contains cells that will form the embryo.
C)  represents the future placenta.
D)  will form the zona pellucida.
E)  contains cells that are discarded.F) C) and D)
G) A) and D)

Question 5

Most congenital birth defects are caused by

Accepted Answer

A)  inherited traits.
B)  lack of oxygen to the fetus.
C)  viral infections during pregnancy.
D)  unknown causes.
E)  None of these choices is correct.F) A) and C)
G) None of the above

Question 6

Which of the following is derived from ectoderm?

Accepted Answer

A)  lens of the eye
B)  thymus gland
C)  tonsils
D)  urinary bladder
E)  dermis of skinF) D) and E)
G) C) and D)

Question 7

The embryonic membrane that completely encloses the embryo in a watery sac is the

Accepted Answer

A)  yolk sac.
B)  amnion.
C)  allantois.
D)  chorion.
E)  ectodermal sac.F) C) and D)
G) A) and C)

Question 8

What event separates childhood from adolescence?

Accepted Answer

A)  puberty
B)  infancy
C)  formation of germ layers
D)  beginning to walkE) A) and B)
F) A) and C)

Question 9

Which gland originates as two evaginations from the duodenum?

Accepted Answer

A)  anterior pituitary gland
B)  posterior pituitary gland
C)  thyroid gland
D)  adrenal glands
E)  pancreasF) A) and B)
G) All of the above

Question 10

The onset of puberty is considered to be the beginning of which life stage?

Accepted Answer

A)  early childhood
B)  late childhood
C)  adolescence
D)  young adult
E)  middle ageF) None of the above
G) A) and E)

Question 11

Premature aging is called

Accepted Answer

A)  progeria.
B)  lactation.
C)  parturition.
D)  Alzheimer's disease.
E)  dementia.F) All of the above
G) A) and D)

Question 12

If the zygote splits into two separate cells,

Accepted Answer

A)  identical twins result.
B)  fraternal twins result.
C)  dizygotic twinning occurs.
D)  both cells die.
E)  paternal twins result.F) All of the above
G) None of the above

Question 13

What type of gene expression are the ABO blood types an example of?

Accepted Answer

A)  complete dominance
B)  codominance
C)  incomplete dominance
D)  recessiveness
E)  polymorphismF) A) and C)
G) D) and E)

Question 14

The allantois enlarges to form the

Accepted Answer

A)  kidney.
B)  gonads.
C)  ureter.
D)  urinary bladder.
E)  urethra.F) B) and C)
G) C) and D)

Question 15

Colostrum differs from milk in that it contains

Accepted Answer

A)  little fat.
B)  no antibodies.
C)  more protein.
D)  more lactose.
E)  more fat.F) A) and B)
G) A) and E)

Question 16

What is formed by closure of neural groove?

Accepted Answer

A)  mesonephros
B)  mandibular processes
C)  neural tube
D)  secondary palate
E)  somitesF) A) and B)
G) B) and E)

Question 17

Damage to the mesoderm during embryological development would affect the formation of the

Accepted Answer

A)  thyroid.
B)  brain.
C)  heart.
D)  teeth.
E)  urinary bladder.F) C) and D)
G) A) and D)

Question 18

An embryo becomes a fetus about

Accepted Answer

A)  14 days after fertilization.
B)  30 days after fertilization.
C)  60 days after fertilization.
D)  3 months after fertilization.
E)  6 months after fertilization.F) C) and D)
G) B) and D)

Question 19

A gene that is responsible for producing trypsin in the pancreas would be a ____ gene.

Accepted Answer

A)  dominant
B)  regulatory
C)  structural
D)  recessive
E)  functionalF) B) and D)
G) B) and E)

Question 20

Which of the following structures originates as an evagination from the floor of the pharynx,moves into the neck,and loses its connection with the pharynx?

Accepted Answer

A)  pancreas
B)  thyroid gland
C)  adrenal medulla
D)  adenohypophysis
E)  parathyroid glandsF) A) and B)
G) C) and D)

Exam 29: Development,growth,aging,and Genetics

Premature aging is called

Correct AnswerverifiedShow Answer

The embryonic membrane that completely encloses the embryo in a watery sac is the

Correct AnswerverifiedShow Answer

The waxy coat of sloughed epithelial cells that covers the fetus is called

Correct AnswerverifiedShow Answer

Colostrum differs from milk in that it contains

Correct AnswerverifiedShow Answer

Most congenital birth defects are caused by

Correct AnswerverifiedShow Answer

What type of gene expression are the ABO blood types an example of?

Correct AnswerverifiedShow Answer

Damage to the mesoderm during embryological development would affect the formation of the

Correct AnswerverifiedShow Answer

Which of the following structures originates as an evagination from the floor of the pharynx,moves into the neck,and loses its connection with the pharynx?

Correct AnswerverifiedShow Answer

Which gland originates as two evaginations from the duodenum?

Correct AnswerverifiedShow Answer

A gene that is responsible for producing trypsin in the pancreas would be a ____ gene.

Correct AnswerverifiedShow Answer

Which of the following is derived from ectoderm?

Correct AnswerverifiedShow Answer

The embryonic heart

Correct AnswerverifiedShow Answer

What event separates childhood from adolescence?

Correct AnswerverifiedShow Answer

The onset of puberty is considered to be the beginning of which life stage?

Correct AnswerverifiedShow Answer

The inner cell mass of the blastocyst

Correct AnswerverifiedShow Answer

What is formed by closure of neural groove?

Correct AnswerverifiedShow Answer

The allantois enlarges to form the

Correct AnswerverifiedShow Answer

If the zygote splits into two separate cells,

Correct AnswerverifiedShow Answer

An embryo becomes a fetus about

Correct AnswerverifiedShow Answer

Which of the following characterizes the developmental age of an eight month old infant?

Correct AnswerverifiedShow Answer

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