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Endocrine
Veterinary endocrine histology
41
Histology
Professional
10/27/2012

Additional Histology Flashcards

 


 

Cards

Term
Cells in pars distalis
Definition
chromophils (stain well) and chromophobes (stain poorly)
Term
types of chromophils
Definition
acidophils (granules stain with acidic dye) and basophils (granules stain with basic dye)
Term
types of acidophils
Definition
somatotrophs and mammotrophs
Term
types of basophils
Definition
thyrotrophs, corticotrophs, and gonadotrophs
Term
somatotrophs
Definition
GH

acidophils
Term
mammotrophs
Definition
prolactin (stim mammary gland)

acidophil
Term
thyrotrophs
Definition
thyroid stimulating hormone (TSH)

basophil
Term
corticotrophs
Definition
secrete adrenocorticotropic hormone (ACTH)
controls glucocorticoid secretion
basophil
Term
gonadotrophs
Definition
FSH and LH

basophil
Term
path of releasing hormones
Definition
secreted by hypothalamic neurons which terminate in median eminance --> enter capillary network in ME; primary plexus which receives blood from superior hypophyseal artery--> drained by hypophyseal portal veins into second capillary network in pars distalis where they terminate on their "-trophs"
Term
pars tuberalis
Definition
arranged around hypophyseal portal veins
Term
low glucocorcitocoids in adrenal medulla
Definition
norepi synthesis
Term
high glucocorticoids in adrenal medulla
Definition
epi synthesis
Term
long cortical artery
Definition
travels from adrenal gland capsule to medulla, providing arterial oxygen w/o influencing epi or norepi production
Term
central vein of medulla
Definition
cortical vessles containing cortical steroids drain into central vein of medulla in adreanal gland
Term
neurohypophysis neurosecretory cells
Definition
ADH/vasopressin and oxytocin MADE IN HYPOTHALAMUS; move down axon in granules to nerve termini; deposited next to inferior hypophyseal artery --> capillary network-->hypophyseal vein
Term
chromaffin cells
Definition

adrenal medulla

 

secrete epi OR norepi

 

stain brown with potassium dichromate

Term
Zona glomerulosa
Definition

top of adrenal cortex

 

column arrangement

 

secrete mineralcorticoids (aldosterone)

Term
what secretes glucocorticoids in adrenal gland?
Definition

zona fasciculata (columns)

 

zona reticularis (chaotic, branching pattern)

Term
Main vain of adrenal gland
Definition
Adrenal medullary vein
Term
what stains darker, norepi or epi?
Definition
norepi stains darker with potassium dichromate
Term
increased glucocorticoids stimulates
Definition
epinepherine synthesis
Term
decreased glucocorticoids secrete
Definition
norepi synthesis
Term
adrenal artery going directly to medulla not influenced by glucocorticoids
Definition
long cortical artery
Term
capillaries in adrenal medulla
Definition
fenestrated
Term
Neurohypophysis
Definition
Median eminance, posterior pituitary, infundibular stalk
Term
adenohypophysis
Definition
pars distalis, pars intermedia, pars tuberalis
Term
structure of neurohypophysis
Definition
unmyelinated axons with nerve cell bodies up in hypothalamus
Term
nuclei associated with hypothalamohypophyseal tract
Definition
Supraoptic nucleus and paraventricular nucleus
Term
pituicytes
Definition
glial type of cells, located in neurohypophysis

act like astrocytes
Term
nuclei in neurohypophysis
Definition
pitiucytes
Term
Posterior pituitary
Definition
pars nervosa, pars intermedia
Term
anterior pituitary
Definition
pars distalis, pars tuberalis
Term
cells in pars intermedia
Definition
melanotrophs - secrete melanocyte stimulating hormone

affects melanin production
Term
blood supply in pars distalis
Definition
sinusoidal capillary
Term
releasing hormones type
Definition
peptide
Term
stroma of thyroid
Definition
loose areolar ct
Term
principal cells in thyroid
Definition
squamous to cuboidal epithilium lining follicles
Term
parafollicular cells
Definition
thyroid; C-cells (clear), secrete calcitonin
Term
parenchyma of parathyroid
Definition
chief and oxophillic cells
Term
oxiphillic cells
Definition
large, many mitochondria, eosiniphilic
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