Ch 9 part 1

Ch 9 part 1 - Chapter 9 Part I Biological Development...

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Unformatted text preview: Chapter 9, Part I Biological Development Hypothalamus Anterior Pituitary Target Organ Releasing Factor “Triggering” Hormone Sex Hormones (Into Bloodstream) When you were just a twinkle in your daddy’s eye… Gonadotropin Effects in Males: • LH surge increases the production and release of T from the testicles. • FSH surge fuels spermatogenesis. – The production of mature male gametes Gonadotropin Effects in Females: • Serve to regulate menses – Days 1-4: FSH levels increase, stimulating the follicle (egg) to develop and grow – Around Day 14: Estrogen reaches a critical level and initiates LH surge. • LH mediates ovulation • The follicle is now termed a “corpus luteum.” Human Menses (Cont’d) • If fertilized, CL synthesizes corticogonadotropic hormone – HCG in humans – Stimulates corpus luteum to keep on secreting progesterone Part II Nervous System Development Early Embryo • Fertilized Ovum • Blastula – Post-conception Weeks 1 and 2 – Sphere of about 128 cells surrounding a fluid-filled cavity • Gastrula – Third week post-conception – Organizes into three distinct cell layers Gastrulation: The Development of the Ectoderm, Mesoderm and Endoderm The nervous system will develop from the ectoderm—the outermost cell layer.outermost cell layer....
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This note was uploaded on 09/12/2010 for the course PSYC 86-407 taught by Professor Vandellen during the Spring '08 term at UGA.

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Ch 9 part 1 - Chapter 9 Part I Biological Development...

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