NHM 201 Exam 1 Ch 1-7 with 100% correct answers

Mammary gland The source of milk for offspring, also called the breast. Functional units of this are the alveoli. Alveoli A rounded oblong-shaped cavity present in the breast. Composed of a cluster of secretory cells with a duct center, whose job is to secret milk. 01:11 01:39 Myoepithelial cells Specialized cells that like the alveoli and can contract to cause milk to be excreted into the ducts. Surrounds secretory cells. Secretory cells Cells responsible for secreting milk components into the ducts. Estrogen Ductal growth. Mammary gland differentiation with menstruation. Stimulates development of the glands that will make milk. Progesterone Alveolar development. After onset of menses and during pregnancy. Hormone that prepares the uterus for fertilized ovum and helps maintain a pregnancy, stimulates uterine buildup during menstrual cycle. Human Growth Hormone Development of terminal end buds. Mammary gland development. Human Placental lactogen Alveolar development. Pregnancy. Prolactin 1. Prolactin → Production: stimulates milk production: ‡ Infant sucking stimulus - major stimulator of prolactin. secretion. ‡ secreted by anterior pituitary. ‡ promotes continued milk production and release. Oxytocin Oxytocin → Release: triggers ejection from breast: stimulated by suckling - the letdown reflex. Lactogenesis Breast milk production Lactogenesis I During last stage of pregnancy. 1st stage of milk production, milk forms, and the lactose and protein content increases. Extends through the first few days of postpartum.