Endocrine System Flashcards
what does a neuroendocrine neuron do?
secrete signal directly into circulatory system
stress response hormone
corticotrophic releasing hormone
growth with calcium hormone
thyrotropin
hypothalamo-pituitary connection: anterior gland
bulbus structure - where gonandotrophs are stored (FSH and LH stimulating)
hypothalamo-pituitary connection: posterior gland
where hormones are directly released into circulation
testicular Leydig cells
a major source of testosterone
line the tubules
FSH -> increase in sperm and testes size
what is the neuroendocrine adrenal axis?
stress response - fight/flight
pineal gland
controls melatonin
pinealocytes - respond to absence of light
melatonin = light, less melatonin = dark
role of cholesterol with hormones
precursor for steroid hormones
lipid soluble - can pass through membranes
sexual dimorphism in hormones example
oestrogen can get into male brain but not female brain
EXTRA INFO
what is the hypothalmic-pituitary-adrenal (HPA) axis
a complex series of interactions between three glands
EXTRA INFO
The fight/flight response in more detail
hypothalamus releases corticotrophin-releasing hormone (CRH)
anterior pituitary gland releases adrenal corticotrophic hormone (ACTH)
goes to adrenal cortices of adrenal glands on top of kidneys - releases glucocorticoid + mineralcorticoid
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