PPT - 302 - SCIENCE 10 - COORDINATED FUNCTIONS OF NERVOUS,ENDOCRINE, AND Reproductive Systems PDF

Coordinated Functions of the Reproductive, Endocrine, and Nervous Systems Michael Jayson D. Mallari Caloocan National Science and Hormones in Male Reproductive Gonadotrophin-releasing hormone (GnRH) Hypothalamus Pituitary Gla...

Coordinated Functions of the Reproductive, Endocrine, and Nervous Systems Michael Jayson D. Mallari Caloocan National Science and Hormones in Male Reproductive Gonadotrophin-releasing hormone (GnRH) Hypothalamus Pituitary Gland Follicle-stimulating hormone (FSH) Luteinizing hormone (LH)  The hypothalamus secretes GnRH. Hypothalamus GnRH Pituitary Gland  The GnRH activates the release of Hypothalamus FSH and LH. GnRH FSH Pituitary Gland LH  The LH goes to testicular cells and Hypothalamus stimulates the secretion of testosterone. GnRH FSH Pituitary Gland LH Testes Testicular cells Testosterone  The FSH, along with testosterone, Hypothalamus stimulates sperm production. GnRH FSH Pituitary Gland LH Testes Testicular cells Testosterone Seminiferous Tubules  Hypothalamus GnRH High concentration of testosterone inhibits the secretion of GnRH. Pituitary Gland LH FSH Testes Testicular cells Testosterone Seminiferous Tubules Hormones in Female  The hypothalamus secretes GnRH. Hypothalamus GnRH Pituitary Gland  The GnRH activates the release of Hypothalamus FSH and LH. GnRH FSH Pituitary Gland LH  The FSH and LH stimulate the Hypothalamus secretion of estrogen. GnRH FSH Pituitary Gland LH Ovaries Estrogen M Most Essential Learning Competency E Describe the feedback mechanisms L involved in regulating processes in the female reproductive system (e.g., C menstrual cycle).  Specific Learning Objectives Describe the important events of the menstrual cycle using video 1 clip. Describe the feedback mechanisms involved in regulating processes in 2 the female reproductive system using diagram.  Lesson 1: The Female Reproductive Objectives: Describe the important events of the menstrual cycle using video clip. Describe the feedback mechanisms involved in  Menstrual Cycle The cycle usually lasts for 28 days but the lengths of each phase vary from person to person.  Ovarian Cycle The cycle usually lasts for 28 days but the lengths of each phase vary from person to person.  Day 1-5 Ovarian The follicular phase begins. The anterior pituitary gland releases FSH and LH. New follicle is developed. Uterine The mixture of blood and discarded tissues exit the body.  Day 5-10 Ovarian The anterior pituitary gland continues to produce FSH and LH to develop the follicle. Both FSH and LH cause the follicle to produce estrogen. Uterine The uterine lining is being repaired.. Increased level of estrogen cause the lining of the uterus to thicken.  Day 11-14 Ovarian More LH will be released to increase the amount of estrogen. The sudden increase of FSH and LH will cause the follicle to rupture. Uterine The uterine lining continues to thicken due to the increased level of estrogen in the bloodstream.  Ovulation The monthly release of an ovum from the ovary. The high level of estrogen in the bloodstream will inhibit the production of GnRH.  Day 15-onwards Ovarian The ruptured follicle turns into corpus luteum. It will continue the secretion of estrogen and also begin to secrete progesterone. Uterine The progesterone and estrogen will develop the uterine lining further to prepare it for implantation.  If fertilization occurs… The fertilized egg will become a zygote. It implants itself in the uterine lining and releases hormone to keep the corpus luteum functioning.  If fertilization did not occur… The egg passes through the uterus without implantation. The corpus luteum disintegrates causing the sudden drop of the progesterone and estrogen levels.  If fertilization did not occur… The sudden drop of estrogen and progesterone levels will trigger the breakdown of the uterine lining. The lining will detach itself from the uterine wall and will be discharged together with the unfertilized egg.  After menstruation The estrogen level becomes low, stimulating the production of GnRH by the hypothalamus. What is the difference between ovarian cycle and menstrual cycle? Why does menstruation come with painful sensation? Occasionally, a zygote does not move into the uterus but attaches to the wall of the fallopian tube. Why is this a potentially dangerous situation for the mother? Why is it not advisable for women nearing menopausal stage to get pregnant? Thank you!