Lecture 22 Unit 3 Flashcards
where does the hypothalamus receive input from
cortex, thalamus, limbic system and internal organs
what does the hypothalamus do
provides a link between the external and internal environment and the endocrine system
what do the hypothalamus and pituitary work together to do
control almost all aspects of growth, development, metabolism, and homeostasis
how does the hypothalamus control the pituitary gland
with special hormones called releasing hormones and inhibiting hormones
how does the hypothalamus release other hormones directly into circulation
through the posterior pituitary
how does the hypothalamus make use of the nervous system
it may send motor impulses to various tissue effectors
how does the hypothalamus make use of the endocrine system
uses it as an effector by secreting releasing and/or inhibiting hormones
what do releasing and inhibiting hormones act on
target cells in the anterior pituitary
what do the 5 types of anterior pituitary cells release into circulation
7 tropic hormones
how many releasing/inhibiting hormones are there
about 7
what are the 5 main cell types of the anterior pituitary gland
- somatotrophs
- thyrotrophs
- lactotrophs
- gonadotrophs
- corticotrophs
what do somatotrophs do
secrete human growth hormone
what do thyrotrophs do
secrete thyroid stimulating hormone
what do lactotrophs do
secrete prolactin
what do gonadotrophs do
secrete follicle stimulating hormone and lutenizing hormone
what do corticotrophs do
secrete adrenocorticotropic hormone and melanocyte stimulating hormone
what does growth hormone releasing hormone regulate
HGH
what does growth hormone inhibiting hormone regulate
HGH or TSH
what does gonadotropin releasing hormone regulate
lutenizing hormone and follicle stimulating hormone
what does prolactin releasing hormone regulate
prolactin
what does prolactin inhibiting hormone regulate
prolactin or melanocyte stimulating hormone
what does corticotropin releasing hormone regulate
ACTH and MSH
what does thyrotropin releasing hormone stimulate
TSH
what does HGH do within target cells
increases synthesis of insulin like growth factors that act locally or enter blood stream
