FINAL EXAM | WITH COMPLETE QUESTIONS AND
ANSWERS | 2025/2026 LATEST UPDATED | 100 % RATED AND
VERIFIED SOLUTIONS | GET AN A+
Where does breast tissue normally develop? - (ANSWER)Along the breast line
- located from under the arms down to the groin
What are the 3 stages of early breast development? - (ANSWER)1. 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? - (ANSWER)4
,What stages of Lactogenesis occur during pregnancy? - (ANSWER)1 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? - (ANSWER)around 16 weeks
Lactogenesis 2 - (ANSWER)The 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? - (ANSWER)2-4 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 - (ANSWER)Small cavity where milk is produced and stored
- made of epithelial cells
What are Alveoli? - (ANSWER)multiple alveolus
What is the Intra-lobular duct? - (ANSWER)Connects a lobule to the lactiferous ducts
What is a Mammary Lobule? - (ANSWER)10-100 alveoli combined together
, What are Lactiferous Ducts? - (ANSWER)connects mammary lobules/intra-lobular ducts to the
nipple
Breast Anatomy - (ANSWER)
What surrounds the breast tissue? - (ANSWER)Fat
Nerves
Lymph Tissue
Vascular Network
Myoepithelial Cells
What is the purpose of the Myoepithelial cells? - (ANSWER)They 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