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BIO 265 Section 9.3: Study Guide Section 9.3 Objectives: Describe the process of thyroid hormone formation and release. Describe the actions of the hormones produced by the adrenal gland.
o Describe the location and structure of the thyroid & parathyroid gland. Which cells produce which hormones and what is their effect?
Complete the following chart as you study section 9.3. Trigge r that stimul ates releas e Tropic Hormones Gland or Organ Release of Other Hormones Primary Action/E ffect Targ et Tissu es or cells Hypothala mus Hormone Pituitary Gland Hormone Low levels of Testose rone signal release of GnRH GnRH signals Anterior Pituitary Gland to release LH & FSH LH acts on the testes to release Testoster one FSH acts on the Sertoli cells of testes to produce Thyroid T3 & T4 Male secondar y sex characte ristics, bone growth, sperm producti on Sper m cells, and andro gens that impac t all other cells Page 1
BIO 265 sperm of the body Calcitonin Negativ e feed: Low levels of Estroge n signal release of GnRH during ovulati on flips to Positive Feedba ck and high levels of estroge n stimula te a surge of GnRH GnRH signals Anterior Pituitary Gland to release LH and FSH LH acts on the thecal cells of the follicles in the ovaries to produce Estrogen FSH develops the follicle an ovum. Parathy roid Parathyroid Hormone Progeste rone is produced by the Corpus luetum which is the follicle after Ovulatio n Proge stron e maint ains the lining of the uteru s in hopes of fertili zation and maint ains lining in early pregn ancy 9.3.1 - Thyroid Hormone Synthesis Be able to explain the diagram below and each step of the process of thyroid hormone formation and release. Page 2
BIO 265

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