Chapter 5 Flashcards
(77 cards)
what are the environmental factors that can affect the quality of ones diet
- financial resources and availability
- transportation
- geographical location
- cultural preferences
- convenience
- knowledge of good nutrition
what are the implications for well-nourished children and youth
- more alert
- more attentive
- better able to benefit from physical activity
- better able to benefit from learning experiences
what are the implications for poorly nourished children
- prone to be quiet and withdrawn
- more likely to be hyperactive
- more likely to show disruptive behavior
- predisposed to accidental injury because they are less alert and have poorer response times
how long is the critical period in pregnancy
the critical period is the first three months of pregnancy
what is the critical period
the period during development in which certain events occur that will have irreversible effects on later developmental stages - it is a period of rapid cell division
what is the neural tube
the neural tube is the beginning structure of the brain and the spinal cord
what is one defect that is impacted considerably during the critical period
neural tube defects
what is the critical period for the development of neural tube defects
within 17-30 days of gestation
how often do neural tube defects occur
1 - 2 births in every 1000 births
what are the factors that increase the risk of neural tube defects
- maternal obesity
- low socioeconomic status
- race
- exposure to high temperatures
- low folate
what do pregnancies with neural tube defects end in
abortions or stillbirths
what are two major problems that may occur as the result of a neural tube defect
- anencephaly
- spina bifida
what is anencephaly
anencephaly is an uncommon and always fatal type of neural tube defect, it is characterized by the absence of a brain, the upper end of the neural tube fails to close and the brain is either missing or fails to develop
how do anencephaly pregnancies often end
they often end in miscarriage, and infants that are born with anencephaly die shortly after birth
what is spina bifida
spina bifida is one of the most common types of neural tube defects, characterized by the incomplete closure of the spinal cord and its bony encasement. the membranes covering the spinal cord often protrude as a sac, which may rupture and lead to meningitis
what are the results of spina bifida
the baby may be paralyzed below the level of the defect, depending on the extent of spinal cord damage, mild cases may not even be noticed but severe cases can lead to death
when should folate supplementation be taken
supplementation should be taken one month before conception and continued throughout the first trimester to reduce the risk of neural tube defects
what is the recommended daily dosage of folate supplementation
0.4 milligrams of folate is the recommended daily dosage for all women of childbearing age
when are the nutrient needs higher than any other time
during pregnancy and lactation (breastfeeding) the nutrient needs are higher than at any other times
why is energy important for a pregnant women
a pregnant women needs extra food energy, they need to take in 300 more kcalories above the allowance of nonpregnant women and only in the second and third trimesters
how much protein should pregnant women consume
10 grams per day higher than nonpregnant women
is there a concern in vegetarians who become pregnant
yes, vegetarians must increase their intake of protein-containing plant foods
can protein supplements be taken during pregnancy
protein supplements cannot be taken, they result in low birth-weights, preterm births and deaths
are essential fatty acids important for the growth of the pregnancy
some essential fatty acids are important for the growth of the fetus, especially foods that are high in omega 3 and omega 6 fatty acids