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How are hormones transported in the body?

How are hormones transported in the body?. What is an endocrine gland?. Endocrine: secretes fluid into blood Exocrine: secrete fluid into a duct (ex: sweat). For your hormone ……. HOW DOES IT WORK? WHAT DOES IT DO? Suggestion conversation topics: WHAT GLAND SECRETES (PRODUCES) IT?

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How are hormones transported in the body?

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  1. How are hormones transported in the body?

  2. What is an endocrine gland? • Endocrine: secretes fluid into blood • Exocrine: secrete fluid into a duct (ex: sweat)

  3. For your hormone…… • HOW DOES IT WORK? WHAT DOES IT DO? • Suggestion conversation topics: • WHAT GLAND SECRETES (PRODUCES) IT? • WHAT DOES IT CONTROL? • WHAT DOES IT TARGET? • WHAT EFFECT DOES IT HAVE? • WHAT TRIGGERS ITS RELEASE?

  4. ENDOCRINE GLANDS • PITUITARY GLAND

  5. a. Thyroid-stimulating hormone (TSH) • Tropic hormone (controls another gland) • Growth & activity of thyroid gland  specifically controlling metabolism rate

  6. What is a tropic hormone? • A synthetic (“man-made”) hormone • A hormone that triggers another endocrine gland to secrete its hormones • Hormones that affect the gonads • Hormones of the thyroid gland

  7. b. Oxytocin- causes contractions c. Antidiuretic hormone (ADH) • Diuresis = urine production • causes kidneys to reabsorb water from the forming urine • stimulus? • caffeine inhibits ADH secretion

  8. Which of the following is NOT a hormone secreted by the pituitary gland? • Oxytocin • ADH • Thyroid-stimulating hormone • Insulin

  9. Summary of the pituitary • Pituitary gland – considered the “master” gland • We covered 3 of the 7 hormones it produces

  10. 2. PANCREAS

  11. a. Insulin – regulates blood glucose levels. • Respond to rising blood glucose levels • Hyposecretion high blood glucose levels …. Diabetes mellitus • Polyuria • Polydipsia • polyphagia

  12. b. Glucagon • regulates blood glucose levels • responds to low blood glucose levels. • Target: liver

  13. 3. GONADS A) OVARIES 1. Estrogens – • stimulate secondary sex characteristics in females • brings about menstrual cycle 2. Progesterone- • brings about menstrual cycle. • Quiets muscles of uterus during pregnancy Hyposecretion of either: infertility

  14. What does hyposecretion mean? • Produces too much • Produces too little • Secretes to a tropic hormone • Is not controlled by a negative feedback mechanism

  15. testes b) Testes 1. Androgens EX: testosterone– cause growth and maturation of reproductive system;secondary sex characteristics; sperm production in adult • Hyposecretion = infertility

  16. 4. PLACENTA (Temporary organ) • human chorionic gonadotropin (hCG) – stimulates ovary to continue producing estrogen and progesterone

  17. Aging and the endocrine glands • Late middle age: efficiency of ovaries begins to decline  menopause • GH declines = muscles atrophy • Mildly hypothyroid • Less able to resist stress/infection (due to thymus, glucocorticoids of adrenal and melatonin from pineal) • Some decline in insulin production  diabetes (not responsible for this slide)

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