Hypothalamus Flashcards
What does Gonadotropin releasing hormone act on
Luteotropes and folliculotrops
What does dopamine do
acts on lactotrophs to inhibit AP production of prolactin
What are the 3 parts of the adenohypophysis
pars distalis pars intermedia pars tuberalis
What regulates ADH
Osmoreceptors, blood vol, stress, circadian rhythm
Hypothalmus role
Secretion of regulating hormone Synthesis of hormone Communicates with pituitary gland
What stimulates oxytocin production
suckling
What’s another name for posterior pituitary
neurohypophysis
Does the neurohypophysis release or synthesize OT and ADH
Neurohypophysis releases OT and ADH
Primary function of hypothalamus
site of hormone production
What does growth hormone inhibitory hormone act on
Somatotrophs
How are hormones transported from the hypothalamus to the anterior pituitary
Portal vessels
What is the target of prolactin
milk producing cells
What does GnRH do
Stimulate AP production of FSH and LH
What is the only hormone under inhibitory control
Prolactin
What does Corticotropin releasing hormone do
Acts on corticotrophs to stimulate AP production of ACTH
What does oxytocin do
stimulate smooth muscle contraction uterine contraction and milk let down
What does diabetes do to ADH
lack of responsiveness to ADH Excessive urination, dehydration, and thirst
What is another name for anterior pituitary
Adenohypophysis
What is the target of oxytocin
Muscle cells
What does prolactin do
stimulate milk production
What does growth hormone releasing hormone act on
Somatotrophs Stimulates AP production of Growth hormone
What does ADH to blood pressure
Increases blood pressure
How similar is GnRH across species
Very similar in different species
What is oxytocin’s role in males
Unclear, secreted during ejaculation Promotes contraction of ductus deferens
What does Thyrotropin releasing hormone do
Acts on thyrotrophs of AP to stimulate TSH (thyroid stimulating hormone)
what is the primary function of posterior pituitary
Site of hormone storage and release
How how are hormones transported from the hypothalamus to the posterior pituitary
Axons
What does the hypothalamus communicate with
Pituitary gland
What is inhibits oxytocin
Progesterone
What two important hormones does the neurohypopphysis make
Oxytocin antidiuretic hormone (ADH)
What kind of tissue is the hypothalamus composed of
neural
What does ADH act on
Kidney (decrease urine output, increase water reorbtion)
