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    Chemical Coordination and Integration
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    Which two hormone maintain the calcium balance in the body?

    Thyrocalcitonin and Parathyroid hormone play a significant role in maintaining the calcium balance of the body. 
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    How many hormones are secreted by pars distalis ?

    Pars distalis produces six  hormones namely:

    i. Growth hormone(GH)
    ii. Prolactin (PRL)
    iii. Thyroid stimulating hormone (TSH)
    iv. Adenocortocotrophc hormone (ACTH)
    v. Luteinizing hormone (LH)
    vi. Follicle stimulating hormone (FSH)


     

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    Which hormone plays a vital role in immunity?
    The thymus gland secretes thymosins which play a major role in the differentiation of T-lymphocytes, which provide cell-mediated immunity. In addition thymosins also increase the production of antibodies to provide humoral immunity. Thus, these hormones play a vital role in immunity of the body. 
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    When thyroxine has positive feed back effect ?
    When the amount of thyroxine level falls below normal, it exerts postive feed back effect on hypothalamus which is stimulated and secretes TSH(thyroid stimulating hormone). It stimulates the anterior lobe of pituitary gland to secrete TSH ,which in turn makes the thyroid gland to secrete T4.
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    What are androgens ?

    Androgens are steroid hormones which secreted by the Leydig cells. They are mainly testosterone which stimulate the development maturation and functions of the male accessory sex organs appearance of the male secondary sex characters, spermatogenesis.
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