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Chapter 28 Pregnancy and Development

front 1

Which of the following is most correct about implantation?
A. Implantation begins 48 hours after ovulation
B. Begins 6 to 7 days after ovulation
C. Begins two weeks after fertilization
D. Implantation occurs in oviduct

back 1

B. Begins 6 to 7 days after ovulation

front 2

The placenta is fully formed and functional by the end of
A. 1st month
B. 2nd month
C. 3rd month
D. 4th month

back 2

D. 3rd month

front 3

Where do umbilical arteries originate from?
A. The heart
B. The kidneys
C. Common Iliac Artery
D. Abdominal Artery

back 3

C. Common Iliac Artery

front 4

Fingers and toes of the embryo is present at what age?
A. Week 3
B. Week 4
C. Week 5
D. Week 6

back 4

D. Week 6

front 5

As soon as the sex of the male fetus is identified, the testes have already been descended into scrotum

back 5

False

front 6

Morphogenesis occurs when body parts shapes and forms

back 6

True

front 7

Gastrulation refers to the stage when blastocyst develops three germ layers

back 7

True

front 8

The size of morula is about the same size as the original zygote

back 8

True

front 9

After implantation occurs, the trophoblast becomes chorion

back 9

True

front 10

The delicate membrane containing the amniotic fluid that bathes the embryo is called
A. Amnnion
B. Chorion
C. Yolk Sac
D. Allantois

back 10

A. Amnion

front 11

The yolk sac in human contain yolk which supplies nutrients to the growing embryo

back 11

False

front 12

In humans, the blood vessel of the allantois become the umbilical blood vessels

back 12

True

front 13

The umbilical artery transports nutrients and oxygen from placenta to the embryo or fetus

back 13

False

front 14

Umbilical vein transport, transports nutrients and oxygen away from the placenta an back to the embryo or fetus

back 14

True

front 15

In human embryonic development, the uterus of the pregnant mother is about the size of grapefruit in what stage?

back 15

Third month

front 16

In seven months of gestation the fetus is normally about 30 cm (12 in ) and about 1.35 kg

back 16

True

front 17

Urine pregnancy test can be positive as early as

back 17

2 weeks

front 18

Hair and nail are derived from

back 18

Ectoderm

front 19

Period in which morula and blastocyst is formed

back 19

Cleavage

front 20

Period when vast amount of cell migration occurs and the three embryonic germ layers appear

back 20

Gastrulation

front 21

The outer layer of the blastocyst which later attaches to the uterus
A. Decidua
B. Trophoblast
C. Amnion
D. Inner cell mass

back 21

B. Trophoblast