CBC Questions and Answers
Where does breast tissue normally develop? - answerAlong the breast line
- located from under the arms down to the groin
What are the 3 stages of early breast development? - answer1. In utero
2. First 2 months of life
3. Puberty
Breast development during menstruation - answer- Estrogen: Induces Ductal System
development
- Progesterone: Induces Lobular-Alveolar development
What is Lactogenesis? – answer The initiation of milk production
How many stages of Lactogensis are there? - answer4
What stages of Lactogenesis occur during pregnancy? - answer1 and 2
Lactogenesis 1 – answer Ductal and Lobular-Alveolar systems grow at an accelerated
rate (influenced by hormones)
- breasts enlarge
- high progesterone levels cause an increase in alveoli
- colostrum begins to produce in the alveoli
When does Lactogenesis 1 occur? - answeraround 16 weeks
Lactogenesis 2 - answerThe placenta is released from the uterus and progesterone
levels drop
- this causes the alveolar cells to begin to release milk and allows them to continue to
produce more milk
How long does Lactogenesis 2 last? - answer2-4 days
What are the 5 main areas of the breast? - answer- Upper Inner
- Lower Inner
- Upper Outer
- Lower Outer
- Tail of Spence
What are the 2 types of breast tissue and what are they composed of? - answer-
Parenchyma: ductal and lobular-alveolar structures
, - Strom: connective tissue (fat, vascular, nerve, lymphatic)
What is an Alveolus - answerSmall cavity where milk is produced and stored
- made of epithelial cells
What are Alveoli? - answermultiple alveolus
What is the Intra-lobular duct? - answerConnects a lobule to the lactiferous ducts
What is a Mammary Lobule? - answer10-100 alveoli combined together
What are Lactiferous Ducts? - answerconnects mammary lobules/intra-lobular ducts to
the nipple
Breast Anatomy - answer
What surrounds the breast tissue? - answerFat
Nerves
Lymph Tissue
Vascular Network
Myoepithelial Cells
What is the purpose of the Myoepithelial cells? - answerThey surround the alveolus and
contract (like a muscle)
- pushes milk out into the ducts
What is the purpose of the Vascular Network surrounding breast tissue? - answer-
supplies nutrients, materials, hormones to each alveolus for milk production
- supplies hormones to the myoepithelial cells for ejection of milk
What is the purpose of fat surrounding breast tissue? - answerprotection
support
provides space for growth
What purpose do nerves serve in the breasts? - answerIntercostal nerves 3, 4 and 5
deal with breast tissue
- innervation to the nipple tells the brain to produce oxytocin when breast feeding
- emptying of the alveolus tells the breast to make more milk
What are Montgomery's Tubercles? - answerGlands that secrete an antibacterial-like
substance that protects the nipples and areola.
- found on the nipple and areola
- enlarge during pregnancy
Lactogenesis 3 - answeralso known as galactopoiesis
- the resupply of mature milk that occurs when milk is removed from the breast