Endo: Pituitary Gland Flashcards
Other name for pituitary gland
Hypophysis cerebri
Master of endocrine gland
Pituitary gland
Size of the Pituitary gland
13x8mm
Weight of the Pituitary gland
0.5 grams
Pituitary gland is covered by the
Dura mater
Pituitary gland is protected by the
Sphenoid bone
Two parts of the pituitary gland
Adenohypophysis & Neurohypophysis
The adenohypophysis is from what portion
Buccal/Glandular portion
Adenohypophysis is derived from an upgrowth (________) from the roof of the primitive pharynx (_________).
Rathke’s pouch & Stomodeum
In adenohypophysis, _______ connecting to the lobe and roof of the _______ disappears. But may persists as _________.
Stalk. Mouth. Craniopharyngeal canal
Other name for anterior pituitary gland
Adenohypophysis
Derived from the brain
Neurohypophysis
Neurohypophysis is from what origin
Nervous
Neurohypophysis is from the floor of the ______ and forms the ______.
3rd ventricle. Infundibulum.
Other name for posterior pituitary gland
Neurohypophysis
Constitute 80% of the gland
Adenohypophysis
Largest subdivision of the anterior pituitary gland
Pars distalis/anterior
Cells found in pars distalis
Basophils (beta cells), Acidophils (alpha cells), Delta basophils & Chromophobes “BADC”
Cells that are acidophils in nature
Somatotropes & Lactotropes/Mammotropes
Cells that are basophils in nature
Thyrotropes & Corticotropes
Cells that are delta basophils in nature
Gonadotropes
Hormone secreted by somatotropes
Somatotropin
Hormone secreted by Lactotropes/Mammotropes
Prolactin/Luteotrophic H/Lactogenic H
Hormone secreted by Thyrotropes
TSH
Hormones secreted by Corticotropes
POMC, ACTH, Lipotropins & Endorphins “PALE”
Hormones secreted by Gonadotropes
LH, ICSH & FSH
Contains small masses of colloid material, and some finely granulated cells
Pars intermedia
Hormone secreted by pars intermedia
MSH
Pars intermedia is a relatively ________ zone
Avascular
Projection from pars anterior. Most vascular part of the gland.
Pars tuberalis
Hormone secreted by pars tuberalis
None
Posterior lobe. No nerve cells.
Neurohypophysis
Neurohypophysis has numerous __________, _______ and small collection of _________ materials.
Neuroglial cells, Fibers & Colloid
In neurohypophysis, cell bodies are located in the
Hypothalamus
Hormones secreted by the neurohypophysis
Vasopressin & Oxytocin
Other name for ADH
Pitresin
Other name for Oxytocin
Pitocin
Vasopressin is secreted by the
Supraoptic nuclei
Oxytocin is secreted by the
Paraventricular nuclei
Other name for neurohypophysis
Pars nervosa
Blood supply of the Pituitary gland is from what branch
Internal Carotid Artery
Supplies the infundibulum. Forms the capillary that forms _________________.
Superior Hypophyseal Artery. Hypothalamic Hypophyseal Portal System.
Supplies the posterior lobe of the pituitary gland
Inferior Hypophyseal Artery
Venous drainage of the Pituitary Gland
Cavernous sinus & Intercavernous sinus
Surgical approaches for the Pituitary gland
Intracranial approach & Endoscopic Transsphenoidal approach
Hormones secreted by the Hypothalamus
GHRH, GHIH, GnRH, PIH, TRH & CRH “GGGPTC”
Pineconed-shape organ. Calcify during adult age.
Pineal gland
Other name for pineal gland
Epiphysis
Pineal gland is derived from the
Roof of diencephalon
Weight of the pineal gland
100-180gms
Pineal gland is located
Between the superior colliculi
Pineal gland is composed mainly of what cells
Pinealocyte & Chief cells
Pinealocyte produces what hormone.
Melatonin.
What is the effect of melatonin
Antigonadotrophic