Lecture 18Outline of previous lectureI. Male reproductive systema. Organsb. Functionsc. StructuresII. Female reproductive systema. Functionsb. AnatomyOutline of current lectureI. HormonesSuccessful reproductionSome of the animals are “ seasonal” breeders that are influenced by the length of the day, others will essentially reproduce any month of the yearReproduction is the basis of all animal productionGonadotropin Releasing HormoneSecreted by: HypothalamusActs upon: anterior pituitaryStimulates release of: FSHGnRH- hypothalamic hormone that provided the positive drive for secretion of both LH and FSH by the anterior pituitaryLH-Luteinizing hormoneSecreted by: anterior pituitaryActs upon: ovaryLH is a pituitary hormone that is responsible forInduces ovulation and development of the corpus luteumAids in the maturation of the follicle and spermatozoaStimulates testosterone production in the maleFSH-follicle stimulating hormoneSecreted by: anterior pituitaryActs upon: ovaryNeeded in very small amountsFSH:Induces follicular developmentInduces estrogen productionStimulates spermatogenesisInhibinSecreted by: FollicleActs upon: Anterior pituitaryInhibin: causes reduction in FSH production by the anterior pituitaryEstrogen (estradiol)Secreted by: follicleResponsible for:EstrusInfluence mobility and secretory function in the reproductive tractUterine milkEarly stage development of the mammary glandProgesteroneSecreted by: Corpus Luteum“pregnancy hormone”maintenance of pregnancyfinal maturation of the mammary glandsreduced excitably of smooth muscle fibersNegative feedback to the hypothalamusOxytocinSecreted by: Posterior pituitary, corpus luteumActs upon: smooth muscleInvolved inMilk let downUterine contractions during parturitionContractions of smooth muscle in the uterus and oviducts during matingProstaglandinSecreted by: Uterine liningActs upon: corpus luteumProduced by the endometrium of the non-pregnant uterusCauses regression of the corpus luteumCauses uterine contractionGives pregnant or open signalInterferon tau (cattle and sheep)Pregnancy recognition signalProduced by fertilized ovumReceived by uterusBlocks leuteolysis (destruction of CL)ANSC 107 1nd EditionLecture 18Outline of previous lecture I. Male reproductive system a. Organsb. Functions c. Structures II. Female reproductive systema. Functions b. Anatomy Outline of current lecture I. Hormones  Successful reproduction - Some of the animals are “ seasonal” breeders that are influenced by the length of the day, others will essentially reproduce any month of the year - Reproduction is the basis of all animal production  Gonadotropin Releasing Hormone - Secreted by: Hypothalamus - Acts upon: anterior pituitary - Stimulates release of: FSH - GnRH- hypothalamic hormone that provided the positive drive for secretion of both LH and FSH by the anterior pituitary  LH-Luteinizing hormone - Secreted by: anterior pituitary - Acts upon: ovary - LH is a pituitary hormone that is responsible for These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Induces ovulation and development of the corpus luteum o Aids in the maturation of the follicle and spermatozoa o Stimulates testosterone production in the male  FSH-follicle stimulating hormone - Secreted by: anterior pituitary - Acts upon: ovary - Needed in very small amounts - FSH: o Induces follicular development o Induces estrogen production o Stimulates spermatogenesis  Inhibin- Secreted by: Follicle - Acts upon: Anterior pituitary - Inhibin: causes reduction in FSH production by the anterior pituitary Estrogen (estradiol)- Secreted by: follicle - Responsible for: o Estrus o Influence mobility and secretory function in the reproductive tract o Uterine milko Early stage development of the mammary gland  Progesterone - Secreted by: Corpus Luteum - “pregnancy hormone” o maintenance of pregnancyo final maturation of the mammary glands o reduced excitably of smooth muscle fibers o Negative feedback to the hypothalamus  Oxytocin - Secreted by: Posterior pituitary, corpus luteum - Acts upon: smooth muscle - Involved in o Milk let down o Uterine contractions during parturition o Contractions of smooth muscle in the uterus and oviducts during mating  Prostaglandin - Secreted by: Uterine lining - Acts upon: corpus luteum - Produced by the endometrium of the non-pregnant uteruso Causes regression of the corpus luteum o Causes uterine contraction o Gives pregnant or open signal  Interferon tau (cattle and sheep)- Pregnancy recognition signal o Produced by fertilized ovum o Received by uterus o Blocks leuteolysis (destruction of