B&HL Anatomy Exam Review 2022

B&HL Anatomy Exam Review 2022/ 1. 5 phases of lactation: 1. mammogenesis 2. lactogenesis I 3. lactogenesis II 4. galactopoiesis 5. involution 2. When does breast development begin?: by the 4th or 5th week of gestation when two parallel primitive milk streaks develop from axilla to groin on the trunk of the embryo 3. What weeks of gestation does the mammary ridge or milk line develop?: by the 5th week of embryonic life 4. What develops during weeks 12-16 of gestation?: areola and nipple develop; as well as the tree-like pattern forming alveoli 5. What develops in weeks 32-40 gestation?: lobular alveolar structures con- taining colostrum develop 6. Is it normal for a neonate's mammary tissue to secrete colostral milk for as long as 3-4 weeks? If so, what is it called?: Yes (witch's milk) (galactorrhea) 7. At puberty what 5 hormones influence breast growth in a girl?: 1. estrogen 2. prolactin 3. luteinizing hormone 4. follicle stimulating hormone 5. growth hormone 8. Buds develop into new branches and small ductules of areolar buds, which later become the alveoli in the mature female breast, also known as: : terminal ductule lobular units 9. complete development of mammary function occurs when?: only in preg- nancy, when the breasts increase in size and the nipple pigment darkens 10. New budding of structures continues until about age : 35 years old 11. Each cluster of secretory cells of an alveolus is surrounded by , a contractile unit responsible for eject- ing milk into the ductules.: myoepithelial cells 12. the basic unit of the mature glandular (mammary) tissue are the .: alveoli