Deck 46: Development

Question 1

The formation on endodermal and ectodermal germ layers occurs at ________.

A) fertilization
B) gastrulation
C) cleavage
D) blastula formation

Answer 1

B

Question 2

Derivatives of the ectoderm include ________.

A) epithelium of the digestive tract
B) epithelium of the respiratory tract
C) nervous tissue
D) none of the above

Answer 2

C

Question 3

During which stage of labor is the fetus delivered?

A) expulsion stage
B) placental stage
C) dilation stage
D) gastrula stage

Answer 3

A

Question 4

Which of the following is not a germ layer?

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

Question 5

The placenta is made up of a contribution from mother and fetus. Which portion is from the fetus?

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

Question 6

Which of the following is highly UNLIKELY method of producing a child?

A) embryo transfer
B) ectopic pregnancy
C) in vitro fertilization
D) none of the above

Question 7

What stage of preembryonic development results in a solid ball of nearly identical cells?

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

Question 8

Derivatives of the endoderm include ________.

A) synovial membranes
B) blood, bone, and lymphoid tissue
C) the digestive tract
D) epithelium of the respiratory tract

Question 9

All of the following are extraembryonic membranes EXCEPT ________.

A) yolk sac
B) allantois
C) chorion
D) placenta

Question 10

The formation of endodermal and epidermal germ layers occurs at ________.

A) gastrulation
B) cleavage
C) fertilization
D) blastula formation

Question 11

At which stage of labor is the afterbirth delivered?

A) dilation stage
B) expulsion stage
C) placental stage
D) none of the above

Question 12

The trophoblast will eventually become the ________.

A) allantois
B) archenteron
C) lining of the endometrium
D) placenta

Question 13

Cells on the dorsal surface of the two-layered embryonic disc migrate to form a raised groove known as the ________.

A) germ cell formation
B) blastocyst
C) primitive streak
D) amnion formation

Question 14

Sperm become functional when ________.

A) capacitation occurs
B) they become spermatids
C) stored in the uterus for several days
D) the tail disappears

Question 15

Derivatives of the mesoderm include ________.

A) glands of the digestive tract
B) nervous tissue
C) skeletal system
D) none of the above

Question 16

Which extraembryonic membrane appears first?

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

Question 17

Cleavage as part as embryonic development is distinctive because it involves ________.

A) cell division by mitosis
B) meiosis
C) the fusion of gametes
D) none of the above

Question 18

The deciduas basalis is ________.

A) not a maternal contribution to the placenta
B) remains in the uterus after birth
C) located between the developing embryo and myometrium
D) none of the above

Question 19

The correct sequence of preembryonic structures is ________.

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

Question 20

Implantation involves ________.

A) placenta completion
B) formation of germ layers
C) fusion of egg and sperm
D) embedding of the blastocyst in the uterine wall

Question 21

Which trimester of pregnancy do all major organs systems begin to develop?

A) first
B) second
C) third
D) none of the above