Ch 39: Pituitary Flashcards
The pituitary gland, also known as the _____ is an important
endocrine organ
hypophysis cerebri,
That main
portion is physically connected to the brain by the ____
infundibulum
The hypophysis is best divided on the embryologic basis into two main parts5: the adenohypophysis and the neurohypophysis. The former comprises_____. The latter comprises ______
the pars infundibularis (or pars tuberalis), the pars intermedia, and the pars distalis
the median eminence, the infundibular stem, and the infundibular process or neural lobe
The terms_____ is used for the median eminence and the infundibular stem.
infundibulum or neural stalk
The term ______usually refers to the pars infundibularis and the infundibulum
hypophysial stalk
The adenohypophysis constitutes about 80% of the total volume of the pituitary gland6 and is an embryologic diverticulum from the_____ region
buccopharyngeal
The neurohypophysis develops as a diverticulum from the_____. Specifically, it is not an actual endocrine-producing gland but more appropriately should be considered a storage gland for neurosecretions produced by the hypothalamus, which are then carried down via the axona of the supraoptico-hypophysial neural tracts.
floor of the third ventricle
The maintenance and regulation of the activity of the adenohypophysis are dependent on the blood supply by way of the hypophysial____
portal system
The neurohypophysis receives its main nerve supply from the hypothalamus by way of fibers known collectively as the hypothalamohypophysial tract. This tract contains two main sets of fibers: _____
supraopticohypophysial tract and the tuberohypophysial tract
Upon gross examination, the pituitary gland is a small, gray, rounded gland. It is developed from ingrown oral epithelium known as _____as an extension of the developing oral cavity
Rathke pouch
In contrast to the anterior lobe, this posterior lobe is supplied by the
inferior hypophyseal artery
