Endo week 3 Flashcards
magnocellular neurons release what kind of hormone from where?
magnocellular neurons release what kind of hormone from where?
Answer:
oxytocin and ADH from posterior pituitary
parvocellular neurons release what kind of hormone from where?
parvocellular neurons release what kind of hormone from where?
Answer: hypothalamus releases inhibitory and releasing hormones which act on Anterior pituitary
the pituitary gland lies in a bony cavity called the?
the pituitary gland lies in a bony cavity called the?
Answer: Sella Turcica
what is the difference between tropic and tropHic hormones?
what is the difference between tropic and tropHic hormones?
Answer:
- tropic = hormone regulates hormone (exp: CRH, GnRH)
- tropHic = hormone regulates growth & development
(exp: ACTH, TSH, FSH)
which nucleus secrete ADH and OT
which nucleus secrete ADH and OT
Answer:
paraventricular nucleus = Oxytocin
supraoptic nucleus = ADH
parturition reflex and milk let down reflexes are an example of _____________ reflex.
parturition reflex and milk let down reflexes are an example of ___neuroendocrine___ reflex
because: part of the reflex is neural and part is endocrine
hypophysiotropic hormones are secreted from what and regulate what?
hypophysiotropic hormones are secreted from what and regulate what?
Answer: hypothalamus secreted them and they regulate the release of hormones from the anterior pituitary.
CRH uses what kind of secondary messenger?
CRH uses what kind of secondary messenger?
Answer:
GPCR —> cAMP —> Protein Kinase A –> increase Ca2+ –> ACTH released
CRH acts on corticotrophs to increase synthesis and secretion of ACTH
TRH uses what kind of secondary messenger?
TRH uses what kind of secondary messenger?
Answer:
GPCR –>IP3 –>increase Ca2+ –> TSH released
TRH acts on thyrotrophs to increase synthesis & secretion of TSH
TRH also stimulates lactotrophs to release Prolactin
GHRH uses what kind of secondary messenger?
GHRH uses what kind of secondary messenger?
Answer:
GPCR –> cAMP –> Protein Kinase A –>increase Ca2+ –> GH released.
GHRH and GHIH(SS) work on somatotrophs
GHRH increase synthesis and secretion of GH
SS inhibit secretion of GH and TSH
GnRH uses what kind of secondary messenger?
GnRH uses what kind of secondary messenger?
Answer:
GPCR –> IP3 –>increase Ca2+ –> FSH and LH
GnRH acts on gonadotrophs to increase synthesis and secretion of FSH and LH
GnRH is released in a pulsatile manner.
what is the precursor to ADH and what are the other chemicals released with ADH ?
what is the precursor to ADH and what are the other chemicals released with ADH ?
Answer:
prepropressophysin -> ADH + neurophysin II + glycopeptid
what is the precursor to Oxytocin and what are the other chemicals released with Oxytocin ?
what is the precursor to Oxytocin and what are the other chemicals released with Oxytocin ?
Answer:
prepro-oxyphisin –> Oxytocin + neurophysin I
