Pituitary Physiology Flashcards
where is the pituitary gland located
inferior to the hypothalamus within the sella turcica of the sphenoid bone
the anterior produces and stores its own hormones true/false
true
list the hormones produced in the anterior pituitary
TSH LH FSH GH Prolactin ACTH
list the precursor hormones/hormones produced in the hypothalamus for each anterior pituitary hormone
TSH - thyrotropin releasing hormone LH/FSH - gonadotropin releasing hormone GH - GHRH Prolactin - Dopamine ACTH - cortisol releasing hormone
which anterior pituitary hormone is released on inhibition of its hypothalamic hormone
prolactin
the posterior pituitary produces and stores its own hormones true/false
false stores hormones made from the hypothalamus
list the hormones stored in the posterior pituitary
oxytocin
ADH/vasopressin
what is the function of ADH
anti-diuretic hormone - increases water reabsorption when serum osmolarity increases which concentrates urine
what is the function of oxytocin
stimulates uterine contraction and ejection of breast milk
why are dynamic pituitary tests used
hormone levels naturally fluctuate throughout the day
an insulin stress test measures what
measures GH and ACTH reserves by giving IV insulin which naturally stimulates GH and ACTH release
what is a short synthacten test used for
measures for ACTH deficiency and adrenal cortical function
suppression test is used when __ of a hormone
too much
stimulation test is used when __ of a hormones
too little
