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10 Cards in this Set
- Front
- Back
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what are the three parts of the adenohypophysis?
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pars distalis (bulk)
pars intermedius (b/w adeno and neuro hypophyses) pars tuberalis (on stalk) |
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what are the 3 types of cells in an islet of langerhans and what do they produce?
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alpha: glucagon (at periphery)
beta: insulin (bulk in middle) delta: somatostatin (few, b/w beta and alpha) |
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what are the three regions of the adrenal medulla and what do they produce?
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zona glomerulosa: mineralcortocoids
zona fasciculata: glucocorticoids zona reticulata: androgens |
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what does the adrenal medulla produce?
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catecholamines (epinephrine and norepinephrine)
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how do hyperactive and hypoactive thyroid glands differ histologically
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hyperactive have very little colloid
hypoactive have lots of colloid hyperactive are dominated by parafollicular cells |
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what is the function of parafollicular cells (C-cells) in the thyroid?
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produce calcitonin
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what are the two types of cells in the parathyroid gland and what is their function?
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chief cells: secrete PTH
oxyphil cells: unknown |
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what is corpora arenacea?
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"brain sand" in pineal gland
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what is the embryonic origin of adrenal cortex and medulla?
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cortex: coelomic epithelium
medulla: neural crest cellls |
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what stimulates secretion of the different layers of the adrenal cortex?
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Glomerulosa: Ang-II stimulates aldosterone secretion
fasciculata: ACTH stim cortisol secretion reticularis: ACTH stim androgen secretion |
