11:067:327 Study Guide - Midterm Guide: Myoepithelial Cell, Mammary Gland, Milk Fever
12 May 2019
School
Department
Course
Professor
Document Summary
Myometrial contractions to remove fluids, compress vasculature. Lactation- gnrh/lh inhibited so no ovulation or estrus. Myoepithelial cells- expel milk form alveoli into ducts. Puberty: duct growth and fat deposit . isometric growth so same as rest of body. Lactation: milk . allometric growth so after hormones and rapid growth. Mammogenesis: mammary development: e, p4, prolactin, gh. Lactopoesis: gh, gluco, thyroid, insulin, parathyroid, prolactin. Long term exposure to estrogen can lead to cancer- alcohol increases estradiol. Milk production initiated by prolactin and inhibited by progesterone and. Milk ejection: excitation of paraventricular and supraoptic nuclei increases oxytocin from posterior pituitary oxytocin triggers myoepithelial cells to contract milk ejection. Colostrum is the first milk which is very high in protein and fat. In cows, lactation peaks 4-6 weeks then declines, you can"t do anything even giving food doesn"t work. Give bovine gh to increase persistency and increase total milk production. You can"t use it in early lactation only after peak production.
