Anatomy Of Pituitary Flashcards
Which lobe is connected to the base of the brain?
The posterior lobe via the pituitary stalk
What covers the pituitary superiorly?
The diaphragma sellae ( a type of dura mater )
The sella turcica is located between which two processes?
The anterior and posterior clinoid processes
The ant lobe develops form ?
Roof of stomodeum (forms the Rathke’s pouch)
The post lobe arises from?
The infundibulum (from the diencephalon)
Which sinus lies anterior to the pituitary?
The sphenoidal
Basilar artery lies____to the pituitary
Posterior
What vessel connects the adenohypophysis with the neurohypophysis and hypothalamus?
The hypothalamo-hypophyseal portal circulation
How are the pituitary lobes regulated ?
Post: by the Hypothalamo-hypophyseal tract (secretion of ADH and oxytocin)
Ant: by the hypothalamo-hypophyseal portal system (secretes many hormones like FSH etc.)
The portal system arises from which artery?
The superior hypophyseal (from internal carotid) which gives primary plexus supplies the Infundibulum and median eminance) and then gives secondary plexus supplying anterior lobe
What is located between Pars distalis and intermedia ?
Rathke’s pouch
Which types of cells in the distalis is most abundant?
The chromophobe cells (Undifferentiated/exhausted chromophils)
Which cells release GH?
Somatotrophs AKA orangeophils
What type of cells are mammotrophs and what do they secrete ?
They are acidophils and they secrete prolactin and LTH ( their granules enlarge during pregnancy )
Which cells have polyhedral structure and are basophils?
Thyrotrophs
