hypothalamus and pituitary disorders Flashcards
hypothalamus functions
Produce Hormones
Specifically releasing-hormones
Also produces both oxytocin and
ADH
Pituitary gland anterior lobe
(Adenohypophysis)
Produces Hormones
Regulated by releasing hormones
Pituitary gland posterior lobe
(Neurohypophysis)
Releases Oxytocin and ADH
Does not produce hormones
role of growth hormone (GH)
growth
metabolism
Role of ADH
Maintain tonic homeostasis
growth
- Triggers growth in nearly every tissue
in the body - Causes replication in chondrocytes
and osteoblasts
- Occurs until growth plates have
fused
metabolism
Increases production of IGF-1
- HGH increases blood glucose
levels, can inhibit insulin
- IGF-1 acts in contrast to prevent
elevated blood glucose levels
Acromegely
Hormonal disorder caused by
chronic excess growth hormone
-99% of cases are due to pituitary
adenomas, most are benign
SIADH
Syndrome of inappropriate
antidiuretic hormone secretion
- Occurs when the body releases
too much ADH