2 The Hypothalamus Flashcards
major features hypthalamus
glands
blood supply
target cells
receptors
endocrine axis
hypothalamus connects to pituitary
pituitary affects other glands
glands affected by pituitary
thyroid
adrenals
gonads
liver
independent of brain / pituitary
parathyroid
thymus
endocrine pancreas
gastrointestinal tract
two organs of pituitary
adenohypophysis = anterior pituitary neurohypophysis = posterior pituitary
PVN
triggers oxytocin release
SON
triggers vasopressin release
vasopressin and oxytocin
only small differences
both peptides
bind to each others receptors
oxytocin in females
role in lactation
OXT and reflexes
cervix, vagina, areola etc
to hypothalamus
OXT in plasma
increases during ovulation, birth and sex
OXT and estrogen
estrogen increases OXT
Lowers threshold for release
OXT in males
increased during ejaculation and orgasm
OXT in general
correlates with sexual satiety
OXT feedback
positive feedback to initialize sex
high concentration lead to satiety
influences subsequent social attachments
