IBLCE Anatomy and Physiology of Lactation

Question 1

Which hormone is primarily responsible for milk synthesis and secretion in the lactating breast?

Accepted Answer

Prolactin

Answer

Estrogen

Answer

Oxytocin

Answer

Progesterone

Question 2

Which hormone triggers the milk ejection reflex (let-down) by causing myoepithelial cells to contract?

Accepted Answer

Oxytocin

Answer

Prolactin

Answer

Progesterone

Answer

Cortisol

Question 3

The functional milk-producing unit of the breast is called the:

Accepted Answer

Alveolus

Answer

Lobule

Answer

Lactiferous sinus

Answer

Montgomery gland

Question 4

During pregnancy, high levels of which hormone inhibit full lactogenesis despite rising prolactin levels?

Accepted Answer

Progesterone

Answer

Estrogen

Answer

Cortisol

Answer

Human placental lactogen

Question 5

Lactogenesis II, the onset of copious milk production, typically occurs how many hours after birth?

Accepted Answer

30–73 hours

Answer

6–12 hours

Answer

12–24 hours

Answer

96–120 hours

Question 6

The cells that surround alveoli and contract in response to oxytocin are called:

Accepted Answer

Myoepithelial cells

Answer

Lactocytes

Answer

Fibroblasts

Answer

Ductal epithelial cells

Question 7

Which breast structure opens onto the nipple surface and transports milk from the lobules outward?

Accepted Answer

Lactiferous ducts

Answer

Cooper's ligaments

Answer

Montgomery glands

Answer

Ampullae