Exam 2 Flashcards
(191 cards)
Mammary gland
Source of milk “breast”
alveoli
round/oblong shapes cavities in breast
functional units in mammary gland
secretory cells
cluster of cells in each alveolus with a duct in the center to secrete milk
myoepithelial cells
surround secretory cells and contracts to secrete milk into ducts in presents of oxytocin
what two hormones are responsible for breast development and lactation?
estrogen and progesterone
what is lactogenesis?
breast milk production
what are the 3 stages of lactogenesis?
- birth to 2-5 days = milk formation begins, lactose and protein content increase
- 2-5 days after birth = high blood to boobs, milk “comes in”, changes in milk composition and quality
- about 10 days after birth = milk composition becomes stable
role of prolactin in lactation?
milk production, release in response to sucking
role of oxytocin in lactation and physical effect is has on mother postpardum?
used for milk let down of milk from alveoli (milk glands) into milk ducts “tingle in breast”
postpardum = uterus contracts
factors that change human milk composition? (4)
over a single feeding
over a day
based on age of baby
maternal nutrition status
what is colostrum?
first milk secreted during the first few days postpartum
how is colostrum different from mature milk?
its lower in carbs and fat
its thick and yellow
very high in protein (immumoglobins) good for babys immune system
what is foremilk?
low in fat and high in carb at start of the feeding
what is hindmilk?
high in fat at end of the feeding
why is it important for baby to get foremilk and hindmilk?
key for child to get both at each feeding to prevent diarrhea and promote satiety
what role/benefit does DHA have in human milk?
- retinal development
- higher IQ score
- may benefit preterm babies
what role/benefit does cholesterol have in human milk?
- cell growth
- cell replication
- higher in breast milk than formula
how does the protein casein in human milk benefit a child?
major class of protein in mature milk, keeps calcium in soluble for to absorb better
how does the protein whey in human milk benefit a child?
aid in digestion and protection from bacteria
what is the dominant carb in milk?
lactose
- it enhances calcium absorption
what fat soluble vitamin is high in colostrum?
vitamin A
what fat soluble vitamin is given to all babys at birth?
vitamin K
the water soluble vitamin content of breast milk is reflective of?
mothers diet
one to be most likely deficient is B6
how does mothers diet influence flavor of breast milk?
breast milk is sweet and taste slightly like what mom eats