endocrine embryo and histo (reynolds) Flashcards
what is the “master regulator” of the endocrine system?
hypothalamus
3 actions of the hypothalamus
secretes ADH and oxytocin; directly innervates the adrenal glands; regulates the pituitary gland with hypothalamic-releasing and inhibiting hormones
what type of cells make up the hypothalamus
neurons and glial cells
2 parts of the pituitary gland
infundibulum and rathkes pouch
where does the infundibulum form from?
nervous system (extension of the dicephalon)
where does rathkes pouch form from?
stomodeum (evagination at the stomodeum)
t/f. both the infundubulum and rathkes pouch are mesoderm
false. ectoderm
3 parts of rakes pouch
pars distalis, pars tuberalis, pars intermedius
adenohypophesis
rathkes pouch
neurohypophesis
infundibulum
what makes up the post pituitary?
infundibulum (and median eminence)
what makes up the ant pituitary?
rathkes pouch
major cell types in ant pit
chromophobes and chromophils
examples of chromophils
ACTH, TSH, GH, prolactin, FSH, LH, melanocyte-stimulating hormone (ADH and oxytocin are indirect from hypothalamus)
what is in the 3rd pharyngeal pouch?
inferior parathyroid and thymus
what is in the 4th pharyngeal pouch?
sup parathyroid and ultimupharyngeal body
what is the fate of the ultimopharyngeal body?
becomes parafollicular cells that secrete calcitonin
cell types of the thyroid
follicular cells and parafollicular cells
where are the follicular cells from?
migrate form the foramen secum
where are the parafollicular cells form?
pouch 4