Lactation

Question 1

What is the anatomy of the mammary gland?

Answer 1

lobules -clusters of avioli encapsulated by connective tissue sheath
lobe- groups of lobules
ducts - interlobular ducts join together forming a gland cistern

Question 2

What are alveoli?

Answer 2

sack like structures - milk is sinthasied here

Question 3

How can mammary glands develop?

Answer 3

isometric = constant with body growth (2-3 months/ after puberty)
allometric = faster than body growth (2-3 months)

Question 4

What happens to the mammary glands during pregnancy?

Answer 4

• extensive development of lobulo-aveolar system
  -controlled by progestrone/oestrogen/placental lactogen

Question 5

What is lactogenisis?

Answer 5

secreatory cells are starting to be activated

Question 6

What are the stages of lactogenisis?

Answer 6

STAGE 1
- enzymes produced
- substrates gatherd
- occurs in the last two months of pregnancy
STAGE 2
- milk secretion from alvioli

Question 7

What triggers lactogenisis?

Answer 7

• cortisol inside of foetus stimulates prostogladin converting into progestrone or oestrodiol

Question 8

What occurs at milk let down?

Answer 8

-suckling removes milk in teat cistern
-neuroendocrine control
-hypothalamus releases more oxytocin to stimulate milk production

Question 9

Why does milk let down occur during labour?

Answer 9

• oxytocin levels

Question 10

How is milk let down inhibited?

Answer 10

• adrenaline causes vasoconstriction reducing the flow of oxytocin