Deck 13: Conception to Birth

Question 1

The __________ gives rise to the nervous system, including the brain and spine, skin, nails, hair, and salivary, pituitary, and mammary glands.

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

Answer 1

D

Question 2

The __________, which emerges between the ectoderm and the endoderm, gives rise to the heart, circulatory and lymph systems, connective tissue, muscle, and bones.

A) vernix caseosa
B) morula
C) mesoderm
D) endoderm

Answer 2

C

Question 3

In prenatal development the first 2 weeks are also called the __________.

A) myelination
B) organogenesis
C) vernix caseosa
D) germinal period

Answer 3

D

Question 4

In prenatal development, the period from 3 to 8 weeks is the critical period of __________, during which all major organs develop.

A) organogenesis
B) vernix caseosa
C) myelination
D) trophoblast

Question 5

__________ is the name given to the fertilized ovum during the first 8 weeks of prenatal development.

A) Morula
B) Embryo
C) Blastocyst
D) Fetus

Question 6

Which of the following is NOT one of the three embryonic germ layers which give rise to all of the major organs?

A) The ectoderm
B) The endoderm
C) The exodrem
D) The mesoderm

Question 7

_________ is the name given to the prenatal human organism from 2 months to birth.

A) Morula
B) Embryo
C) Blastocyst
D) Fetus

Question 8

The ectoderm, or outer layer, gives rise to the nervous system.

Question 9

The trophoblast forms between the outer mass and the environment and will later develop into the placenta.

Question 10

How development occurs prior to birth gives us information about development after birth.

Question 11

During embryonic development, the heart begins to beat within the first 2 weeks.