BIO270H1 Lecture Notes - Lecture 6: Ovoviviparity, Signal Transduction, Vitellogenin
Document Summary
Signal transduction and endocrine regulation continued insulin and glucagon and secreted by the pancreas. When blood glucose decreases, k+ channels close, depolarization, ca2+ channels open, this stimulates the docking and exocytosis of chh, chh then binds to receptors on the target cells and the cell releases glucose. Overview production of offspring through sexual or asexual processes to ensure a species continues. Parthenogensis only ova and female reproductive system is involved no male gametes ex: daphnia go through parthenogensis when environment is stable: if unstable, then they undergo sexual reproduction, sexual reproduction. Mature follicle completes meiosis i, ruptures, and is ovulated ovum escapes ovary and moves into abdominal cavity and enters oviduct (fallopian tube) that carries the ovum to the uterus. Reproductive hormones endocrine system is the most important steroid hormones: produced in gonads, derived from cholesterol, androgens control male system testosterone, estrogen control female system estradiol formed via conversion of androgen to estrogen by aromatase, hypothalamic pituitary axis.
