T. Pituitary Flashcards
Anterior pituitary
Secretes hormones that regulate activities (growth to reproduction)
FLAT PIG
Anterior Pituitary hormones
FSH - Follicle-Stimulating Hormone LH - Leuteinizing Hormone ACTH - Adrenocorticotropic Hormone TSH - Thyroid Stimulating Hormone Prolactin - stimulates milk in female mammary glandsIgnore GH - Growth Hormone
Posterior Pituitary
Secretes ADH and oxytocin
produced in hypothalamus then go to posterior pituitary for storage
pituitary gland
master gland because it controls the function of most other endocrine glands
Acromegaly
- characterized by an overproduction of GH
- (overfuncitoning) overgrowth of bones and soft tissues.
- Bones thicker/fatter but not longer.
- Can also have heart enlargement, hypertension and DM.
- We want to decrease growth hormone by radiationg or meds. Sometimes need to take out pituitary (can go through the nose for that)
Hypopituitarism
- any decrease in 1 or more of pituitary hormones
* most common hormone deficiencies involve GH and gonadotropins (i.e., LH, FSH).
Panhypopituitarism
is the total failure of the pituitary gland and deficiency of all pituitary hormones
ACTH deficiency
can lead to acute adrenal insufficiency and hypovolemic shock from sodium and water depletion.
Syndrome of inappropriate antidiuretic hormone (SIADH)
- is the release of ADH despite normal or low plasma osmolarity.
- abnormal production of ADH, fluid retention, concentrated urine. Look to do in and outs, fluid restriction, daily weights
- hyponatremia results from an excess of water rather than a deficiency of sodium
- Increased ADH –> Increased water reabsorption in renal tubules –>Increased intravascular fluid volume –>Dilutional hyponatremia and decreased serum osmolality
Diabetes insipidus
- a deficiency in production or secretion of ADH or a decreased renal response to ADH.
- Increased thirst (polydipsia) and polyuria.
- Sever dehydration and hypovolemic shock happen bc Urine output is so great that person can’t keep up with liquid intake.
hyponatremia
occurs when the concentration of sodium in your blood is abnormally low.