Breasts and Lactation (Lec 17)

Question 1

Secretory Activation: Milk Timeline

Answer 1

Onset of copious milk secretion

• Day 1-3 (colostrum): rich in immunoglobulins, lysosome
• Day 3-6 (mature milk): rich in lactose, water, protein

Question 2

Secretory Activation: Trigger

Answer 2

Progesterone withdrawal initiates Secretory Activation

- increase in Lactose associated with milk production

Question 3

Secretory Activation: Hormones Required

Answer 3

Permissive: Prolactin, Insulin, Andrenal Cortisol
Trigger: Removal of progesterone
Milk ejection: Oxytocin

Question 4

Alveolus

Answer 4

Temporary milk storage

Question 5

Benefits of Breastfeeding: Mother

Answer 5

• Recovery from childbirth
• Body weight loss
• Suppression of maternal fertility
• Bone mineralization
• Cholesterol clearance

Question 6

Benefits of Breastfeeding: Baby

Answer 6

• Ideal nutrition
• Species specific
• Facilitates growth and development
• Increases IQ
• Protects against illness

Question 7

Immune Cells in Milk

Answer 7

B-lymphocytes, Macrophages, Neutrophils, T-lymphocytes