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29 Cards in this Set
- Front
- Back
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What are the embryologic origins of the pituitary gland
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1. Stomodeal ectoderm - Ranthke's pouch - forms the adenohypophysis or anterior pituitary
2. An evagination of the diencephalon - neuroectoderm - forms the neurohypophysis or posterior pituitary |
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Ranthke's pouche gives rise to
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the anterior pituitary
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Neuroectoderm makes up the
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posterior pituitary
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where is the pituitary located
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in the sella turcica of the sphenoid bone below the hypothalamus
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The pars nervosa is a subdivison of what anatomical structure
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the posterior pituitary
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The infundibulum is derived from what embyonic origin
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the neurohypophysis
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3 subdivisions of the anterior pituitary are
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pars distalis
pars tuberalis pars intermedia |
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What subdivison of the adenohypophysis forms the majority of the pituitary gland
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pars distalis
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which cells are larger - acidophils or basophils
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basophils
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which cells are more numerous in the pars distalis - acidophils or basophils
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acidophils
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gigantism or dwarfism can result from the inappropriate release of what hormone
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growth hormone
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somatotropes secrete
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somatotropin or growth hormone
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mammotropes secrete
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prolactin
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two types of acidophils are
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somatotropes and mammotropes
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what is galactorrhea
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continuous milk production or "nipple discharge"
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what can cause galactorrhea
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pituitary adenomas (tumors in the pituitary gland)
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galactorrhea can result in the overproduction of what hormone
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prolactin
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prolactin stimulates
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milk secretion
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Name the 3 types of basophils
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thyrotropes
coriticotropes gonadotropes |
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thyrotropes secrete
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thyroid stimulating hormone (TSH)
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gonadotropes secrete
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leutinizing hormone (LH)
and follicle stimulating hormone (FSH) |
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what is the most important hormone secreted by corticotropes
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adrenocorticotropic hormone (ACTH)
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the pars tuberalis contains which specific cell type
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gonadotropes only
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the pars intermedia is composed of what specific cell type
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corticotropes only
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where is oxytocin synthesized
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in the paraventricular nucleus of the hypothalamus
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where is ADH or vasopressin synthesized
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in the supraoptic nuclei of the hypothalamus
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what is the function of ADH
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inceases water retention
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what is the function of oxytocin
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stimulates smooth muscle contraction, important in the uterus during childbirth and in the mammary glands for milk secretion
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large nerve endings in the pars nervosa
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herring bodies
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