Chapter 10- Fetal Development

Question 1

The heart is fully developed at what gestational week?

Answer 1

8th week

Question 2

What is the duration of the pre-embryonic stage?

Answer 2

fertilization- 2nd week

Question 3

What is the duration of the embryonic stage?

Answer 3

end of the 2nd week-8th week

Question 4

What is the duration of the fetal stage?

Answer 4

end of the 8th week-birth

Question 5

What is formed in the ectoderm?

Answer 5

CNS
special senses
skin
glands

Question 6

What is formed in the mesoderm?

Answer 6

skeletal
urinary
circulatory
reproductive organs

Question 7

What is formed in the endoderm?

Answer 7

respiratory system
liver
pancreas
digestive system

Question 8

Where does fertilization take place?

Answer 8

fallopian tubes

Question 9

When is the earliest to detect the sex of the baby?

Answer 9

12 weeks

Question 10

What closes when the infant takes it first breath?

Answer 10

foramen ovale

Question 11

What does the ductus venosus connect?

Answer 11

connects the umbilical vein to the inferior vena cave

Question 12

What does the ductus arteriosus connect?

Answer 12

connects the main pulmonary artery to the aorta

Question 13

What does the foramen ovale connect?

Answer 13

anatomic opening between the right and left atrium

Question 14

How does the fetal circulatory system work?

Answer 14

carry highly oxygenated blood to vital areas (heart and lungs), while shunting it away from less vital ones (lungs and liver)

Question 15

Genetics: 50% affected and 50% unaffected; gender equally affected

Answer 15

autosomal dominant inheritance

Question 16

neurofibromatosis, Huntington’s disease, achondroplasia, and polycystic kidney disease are examples of what genetic disorder?

Answer 16

autosomal dominant inheritance

Question 17

Genetics: 50% carrier, 25% normal, 25% affected; gender equally affected

Answer 17

autosomal recessive inheritance

Question 18

cystic fibrosis, phenylketonuria, Tay-Sachs disease, Sickle cell disease are examples of what genetic disorder?

Answer 18

autosomal recessive inheritance

Question 19

Exposure to teratogens poses the greatest during what time period?

Answer 19

during the first 8 weeks

Question 20

Down Syndrome is an example of what type of genetic disorder?

Answer 20

trisomy numeric abnormality