3: Posterior Pituitary Gland

Pituitary Gland Diagram

The pituitary gland (hypophysis) hangs just inferior to the?

• Diencephalon

the Pituitary Gland is attached to the hypothalamus by a stalk-like structure called the?

• Infundibulum

The pituitary gland is structurally and functionally divided into the?

• Anterior (adenohypophysis)

• Posterior Lobes (neurohypophysis)

The posterior pituitary is the ….. part of the pituitary gland

• Neural Part

The posterior pituitary stores and releases hormones stored in the ?

• Hypothalamus

. Axons from the hypothalamic neurons travel down the infundibulum into the?

• Posterior Lobe

• and release their Hormones.

The posterior pituitary gland stores and secretes what two hormones?

• ADH

• Oxytocin

Antidiuretic hormone is also known as ……vasopressin?

• Arginine Vasopressin

Vasopressin has properties that result in?

• Pressor Response

• Drop in BP

The primary function of ADH is to stimulate?

• Water Retention in the Kidneys

• Making more Concentrated Urine.

ADH’s effects as an Antidiuretic are far more significant then its role as ?

• A Vasoconstrictor

ADH Increases blood Pressure through what processes?

• Retention of Water

• Vasoconstriction of Arteries

Diuresis means to?

• Loose Water

Oxytocin stimulates contraction of the?

• Contraction of the Uterus

• Necessary for Childbirth

Oxytocin stimulates what female glands?

• Mammary Glands
  - Producing Milk

In males, oxytocin released during?

• Ejaculation

ADH is synthesised in the?

• Supraoptic nucleus of the Hypothalamus

Oxytocin is synthesised in the?

• Paraventricular Nucleus of the Hypothalamus.

ADH and oxytocin are produced in the neuronal…?

• Neuronal Cell Bodies of the Nuclei of the Hypothalamus

ADHD and Oxytocin transported from the Hypothalamus to…?

• transported to the posterior pituitary

• via the axons of the

• hypothalamohypophyseal tract

the posterior pituitary is more of a ….. organ than a true endocrine gland?

• Storage Organ

The release of ADH and oxytocin from the posterior pituitary is controlled by what reflexes?

• Neuroendocrine Reflexes

ADH is released when blood osmolality…?

• Increases