Histology for Final exam Flashcards
distant vs. adjacent vs. own cell signalling
endocrine vs. exocrine vs. autocrine
Three types of hormones
poptides & glycoproteins –> stored
steroids –> not stored, stained very eosinophilic
amino acids
where is pituitary gland
beneath third ventricle, connected to bottom of hypothalamus. lies in sphenoid bone
adenohypophysis
anterior pituitary
parts of anterior pituitary
pars distalis
pars tuberalis
pars intermedia
neurohypophysis
posterior pituitary
parts of posterior pituitary
pars nervosa
infundibulum
median eminance (hypothalamus)
embryo of neurohypophysis
from nervous tissue of hypothalamus
embryo of adenohypophysis
From ectoderm of roof of mouth
pars distalis vs pars nervosa staining
par distalis stains darker
Types of cells in pars distalis
Adidophils
Basophils
Chromophobes don’t stain
Acidophils, and what they make
A type of cell in pars distalis (anterior pituitary)
somatotrophs –> growth hormone
mammatrophs –> prolactin
Basophils, and what they make
A type of cell in pars distalis (anterior pituitary)
Corticotrophs –> ACTH
thyrotrophs –> thyrotropin
gonadotrophs –> FSH, LH
Control of AP/pars distalis
achieved by hypophyseal portal system, the anatomical link between hypothalamus via hormons
arteries linked in hypophyseal portal system
superior hypophyseal artery –>primary capillary plexus –> capillary links –> secondary capillary plexus
