Quiz2_Ch2 and Ch3 (Prenatal Development and Perinatal Health/Risk)

The period of time when the developing individual is most likely to be affected by teratogens is

the period of the embryo.

The effects of a teratogen depend on

the size of the dosage. the length of the dosage.

Your friend is pregnant and chronically anxious and stressed. According to the research,

your friend may have a baby that cries and fusses more and has problems regulating emotions.

All of the following are considered gametes, EXCEPT

zygotes

Compared with infant formula, human milk

-is more nutritionally matched to infants. -changes to match the infant's needs over time. -contains immunities for the infant. *All of the above.*

The heart is beating by __________ after conception

4 weeks

How, given identical genes in each cell, can the different tissues in the body (like muscles, blood, sensory receptors, etc.) develop?

Because of the epigenome

When it comes to cigarette smoking and fetal birthweight, it appears that

both parents smoking doubles the effect of reduced birthweight.

Ken has twins, a boy and a girl. These twins are

dizygotic

There are three stages of childbirth. The ____ stage lasts the longest (8-14 hours for first-time mothers and about 6 hours on average for subsequent births).

first