CHAPTER 10.2: Prenatal Development

Question 1

describe the germinal stage.

Answer 1

lasts from conception to 2 weeks post conception.

zygote forms and cell division occurs

Question 2

describe the embryonic stage.

Answer 2

from weeks 2-8.

embryo begins developing major physical structures like the heart, nervous system and the beginnings of limbs

Question 3

describe the fetal stage.

Answer 3

week 8 - birth.

skeletal, nervous and organ systems start to activate and become specialized

Question 4

when in development does the forebrain, midbrain and hindbrain divide?

Answer 4

4 weeks

Question 5

when in development do the 2 hemispheres, brainstem and cerebellum differentiate?

Answer 5

11 weeks

Question 6

when in development does a large increase in myelination occur?

Answer 6

final month before birth

Question 7

how much do pregnant women need to increase their energy intake?

Answer 7

20%

Question 8

children born to malnourished moms are more likely to have ___

Answer 8

various health problems

Question 9

what are teratogens?

Answer 9

substances that are capable of producing physical defects in fetus

Question 10

describe fetal alcohol syndrome

Answer 10

developmental disorder resulting in abnormality in mental functioning, growth and development

Question 11

smoking while pregnant increases risk of ___

Answer 11

miscarriage, death before infancy and premature birth