CBC Questions with Correct Answers
Where does breast tissue normally develop? - ANSWERSAlong the breast line
- located from under the arms down to the groin
What are the 3 stages of early breast development? - ANSWERS1. In utero
2. First 2 months of life
3. Puberty
Breast development during menstruation - ANSWERS- Estrogen: Induces Ductal
System development
- Progesterone: Induces Lobular-Alveolar development
What is Lactogenesis? - ANSWERSThe initiation of milk production
How many stages of Lactogensis are there? - ANSWERS4
What stages of Lactogenesis occur during pregnancy? - ANSWERS1 and 2
Lactogenesis 1 - ANSWERSDuctal 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? - ANSWERSaround 16 weeks
Lactogenesis 2 - ANSWERSThe 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? - ANSWERS2-4 days
What are the 5 main areas of the breast? - ANSWERS- 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? - ANSWERS-
Parenchyma: ductal and lobular-alveolar structures
, - Strom: connective tissue (fat, vascular, nerve, lymphatic)
What is an Alveolus - ANSWERSSmall cavity where milk is produced and stored
- made of epithelial cells
What are Alveoli? - ANSWERSmultiple alveolus
What is the Intra-lobular duct? - ANSWERSConnects a lobule to the lactiferous ducts
What is a Mammary Lobule? - ANSWERS10-100 alveoli combined together
What are Lactiferous Ducts? - ANSWERSconnects mammary lobules/intra-lobular ducts
to the nipple
Breast Anatomy - ANSWERS
What surrounds the breast tissue? - ANSWERSFat
Nerves
Lymph Tissue
Vascular Network
Myoepithelial Cells
What is the purpose of the Myoepithelial cells? - ANSWERSThey 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? - ANSWERS-
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? - ANSWERSprotection
support
provides space for growth
What purpose do nerves serve in the breasts? - ANSWERSIntercostal 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? - ANSWERSGlands that secrete an antibacterial-
like substance that protects the nipples and areola.
- found on the nipple and areola
- enlarge during pregnancy
Lactogenesis 3 - ANSWERSalso known as galactopoiesis
- the resupply of mature milk that occurs when milk is removed from the breast