Physiology Ch7

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Author:
tlcolumna
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51887
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Physiology Ch7
Updated:
2010-11-27 16:45:36
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Physiology Ch7 Intro Endocrine System
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Physiology Ch7: Intro. To Endocrine System
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  1. What is a Hormone?
    It is a chemical secreted by a cell or group of cells into the blood for transport to a distant target, where it is effective a very low concentrations.
  2. What are Pheromones?
    They are chemicals singals secreted into the external envirnomet
  3. What is Cellular Mechanism of Action?
    Hormones bind to receptors to initiate responses.
  4. How is Hormone activity limited?
    By Terminating secretion removing hormone from the blood, or teminating activity at target cell.
  5. What is a Hormone's Half Life?
    The rate of hormone breakdown
  6. What are the three types of hormones?
    • 1. Peptide/Protein Hormones
    • 2. Steroid Hormones
    • 3. Amine Hormones
  7. What are peptide/Protein Hormones?
    They are composed of 3 or more animno acids
  8. What are steroid?
    They are synthesized in smooth ER and derived from cholesterol
  9. What are Amine Hormones?
    They Derive from either tryosine or thrptophan
  10. Peptide hormones are made as inactive __________ and processed to ______ that binds to surface receptors, are transported dissolved int he plasma and have a short half life.
    Preprohormones and Prohormones
  11. Many Endocrine reflexes involve the nervou system, either through _______ or through neurons that influence hormone release.
    Neurohormones
  12. The Pituitary Gland is composed of what?
    • Anterior pituitary
    • Posterior Pituitar
  13. What are the Two Neurohormones are released by the posterior pituitary?
    Oxyotcin and Vasopressin
  14. What doe Trophic Hormones control?
    The secretion of other hormones
  15. A Thyroid-Stimulating hormone is not what?
    It is not an amino acid derivative
  16. Anterior pituitary hormones are controlled by what?
    By Releasing hormones and inhibiting hormones from the hypothalamus
  17. The Hyphothalamic Trophic Hormones reach the pituitary throught what?
    The Hypothalamic-hypophyseal portal system
  18. What are the six Anterior Pituitary Hormones?
    • Prolactin
    • Growth Hormone
    • Follicle-stimulating Hormone
    • Luteninzing Hormone
    • Thyroid-stimulating hormone
    • Adrenocorticotrophic Hormone
  19. What is Synergism?
    If the combination of two or more hormones yields a result that is greater than additive
  20. What is Antagonistic?
    If one hormone opposes the action of another
  21. Diseases of hormone excess are usually due to what?
    Hypersecretion
  22. Symptoms of hormone deficiency occur when too little hormone is secreted which is called?
    Hyposecretion
  23. What many reult from problem with hormone receptors or signal transduction pathways?
    Abnormal Tissue Responsiveness

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