Free CLC Development & Physiology of Lactation Questions and Answers

Question 1

Which hormone is primarily responsible for milk ejection (let-down)?

Accepted Answer

Oxytocin

Answer

Oxytocin is the hormone primarily responsible for the milk ejection reflex, commonly known as 'let-down.' When a baby suckles, nerve endings in the nipple send signals to the brain, stimulating the release of oxytocin. This hormone causes the myoepithelial cells around the milk-producing alveoli to contract, pushing milk down the ducts and out of the nipple, making it available to the infant.

Question 2

What stage of lactogenesis begins after the delivery of the placenta?

Accepted Answer

Lactogenesis II

Answer

Lactogenesis II, often referred to as 'the coming in of milk,' is the stage of milk production that begins after the delivery of the placenta. The sudden drop in progesterone levels following placental expulsion, combined with high prolactin levels, triggers the copious production of mature milk. This typically occurs between 30 and 72 hours postpartum, marking a significant increase in milk volume.

Question 3

Where is milk primarily produced within the breast?

Accepted Answer

Alveoli

Answer

Within the breast, milk is primarily produced in the alveoli, which are tiny, grape-like sacs located in the mammary glands. These specialized cells absorb nutrients from the bloodstream and convert them into breast milk. The milk then collects in the lumen of the alveoli before being transported through the ducts.

Question 4

Which hormone stimulates milk production?

Accepted Answer

Prolactin

Answer

Prolactin is the primary hormone responsible for stimulating milk production (lactogenesis) in the mammary glands. It is released from the anterior pituitary gland in response to nipple stimulation during breastfeeding. While other hormones like oxytocin are involved in milk ejection, prolactin specifically drives the synthesis of milk.

Question 5

What is the function of Montgomery glands?

Accepted Answer

Nipple lubrication

Answer

Montgomery glands are small sebaceous glands located on the areola, the pigmented area around the nipple. Their primary function is to secrete an oily substance that lubricates and protects the nipple and areola. This secretion also contains antibacterial properties and olfactory cues that may help guide the infant to the breast.

CLC - Certified Lactation Counselor Practice Test

CLC - Certified Lactation Counselor Practice Test

Free CLC Development & Physiology of Lactation Questions and Answers