A congenital deficiency in secretion of the thyroid hormone is called:
A) diabetes.
B) hirsutism.
C) gigantism.
D) cretinism.
D
Explanation: A) Diabetes is a deficiency of insulin (mellitus) or ADH (insipidus).
B) Hirsutism is excessive growth of hair.
C) Gigantism is growth that is abnormally large.
D) Correct.
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How do self-antigens that are specific to tissues away from the thymus (like insulin or keratin for example) get in the thymus so that developing T cells that react to them can be deleted?
A. Dendritic cells pick them up in the periphery and carry them to the thymus. B. Specialized macrophages in the thymus filter the bloodstream and present antigens found there to developing T cells. C. A transcription factor, AIRE is expressed in thymic medullary epithelial cells, which allows these cells to express proteins normally found in other tissues. D. They do not get to the thymus, all tissue-specific T cells are deleted in the periphery. E. There are special chaperone proteins that bind to peripheral proteins and carry them to the thymus.
Which term describes the time and events surrounding birth?
A) prenatal? B) ?perinatal C) ?postnatal D) ?virile
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Indicate whether the statement is true or false
Which hormone plays a significant role in appetite stimulation?
A) Leptin B) Insulin C) Ghrelin D) Thyroxine