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    Endocrine System

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    Matching: Match the following hormones to the correct descriptions.

    a. steroid hormones b. peptide hormones

    1. ___ lipid-soluble molecules derived from cholesterol; can diffuse directly across the lipid
    bilayer of a target cell's plasma membrane.
    2. ___ various peptides, polypeptides, and glycoproteins.
    3. ___ one example involves testosterone, defective receptors, and a condition called testicular
    feminization syndrome.
    4. __ hormones that often require assistance from second messengers.
    5.___ hormones that bind to receptors at the plasma membrane of a cell; the receptor then
    activates specific membrane-bound enzyme systems, which in turn initiate reactions
    leading to the cellular response.
    6. __ lipid-soluble molecules that move through the target cell's plasma membrane to the
    nucleus, where it binds to some type of protein receptor. The hormone-receptor complex
    moves into the nucleus and interacts with specific DNA regions to stimulate or inhibit
    transcription of mRNA.
    7.__ water-soluble signaling molecules that may incorporate anywhere from 3 to 180 amino
    8. __ involves molecules such as cyclic AMP, which activates many enzymes in cytoplasm that,
    in turn, cause alteration in some cell activity.
    9. __ glycagon is an example.
    10.__ cyclic AMP relays a signal into the cell interior to activate protein kinase A.

    Matching: Match the hormone to its corresponding action.

    1. ___ ACTH A. stimulates egg and sperm formation in ovaries and testes.
    2. ___ ADH B. targets pigmented cells in skin and other surface coverings; induces color changes in response to external stimuli and affects some behaviors.
    3. ___ FSH C. stimulates and sustains milk production in mammary glands.
    4. ___ STH (GH) D. stimulates progesterone secretion, ovulation, and corpus luteum formation in females; promotes testosterone secretion and sperm release in males.
    5. ___ LH E. induces uterine contractions and milk movement into secretory ducts of the mammary glands.
    6. ___ MSH F. stimulates release of thyroid hormones from the thyroid gland.
    7. ___ OCT G. acts on kidneys to conserve water required in control of extracellular fluid volume.
    8. ___ PRL H. stimulates release of adrenal steroid hormones from the adrenal cortex.
    9. ___ TSH I. promotes growth in young; induces protein synthesis and cell division; has roles in adult glucose and protein metabolism.

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    Solution Summary

    Related to the endocrine system, this solution provides assistance with a matching exercise, and adds a helpful hormonal chart and related links.