Fx: Influences regulation of pancreatic exocrine fx and metabolism of ansorbed nutrients
List the Gonad hormones
Women (Ovaries)- Estrogen, Progesteron
TT and fx on next cards
TT: reproductive system, breasts
Fx: Stimulates development of secondary sex characteristics, prep of uterus for fertilization and fetal development, stimulates bone growth
TT: Reproductive system
Fx: Maintains lining of uterus necessary for successful pregnancy
TT: Reproductive system
Fx: Stimulates development of sexondary sex characteristics, spermatogenesis
Which hormones are not water soluble?
Steroid and thyroid hormones
How are they transported then?
Stick to plasma protein and travel through blood that way
Are hormones active or inactive when bound to protein?
What is the point of a hormone binding to protein then?
They can use protein as transport and then be released when appropriate and immediately exert their action and the target tissue
_____-Soluble hormones circulate freely in the blood and are not dependent on proteins for transport.
How does a hormone know that it can hop onto a certain type of tissue?
The receptors have a "lock-and-key" mechanism and a hormone will only act on cells that have a receptor specific for that hormone
There are two type of receptors. What are they?
Within the cell and cell membrane
What hormones attach to within cell receptors?
steroid and thyroid
What hormone receptors are cell membranes receptors?
Protein type hormone receptors
Whar affects the mechanism of action for the hormone?
Location of receptor sites
Steroid and thyroid hormone receptors are located inside the cell. Since these hormones are lipid soluble, how do they pass through the target cell membrane?
by passive diffusion
What is referred to as the master gland?
What two groups of hormones does the hypothalamus secret?
Inhibiting and Releasing
the anterior pituitary is controlled by what and how?
hypothalamus by inhibiting and releasing hormones
What are tropic hormones? Examples.
these are hormones that control the secretion of hormones by other glands
Ex: thyroid stimulating hormone stimulates the thyroid gland to secrete thyroid hormones
Ex: Adrenocorticotropic hormone stimulates the adrenal cortex to secrete corticosteroids
Ex: Follicle stimulating hormone stimulates secretion of estrogen and the development of ova and sperm
Ex: LH stimulates ovulation in female and secretion of sex hormones in both sexes.
what are the other two hormones from the anterior pituitary?
GH and prolactin
what connects the hypothalamus and posterior pituitary?
nerve tracts (median eminence)
what hormones are secreted by the posterior pituitary?
antidiuretic hormone and oxytocin
Where are these two hormones produced?
STORED in posterior pituitary
What does the antidiuretic hormone do?
regulates fluid volume by stimulating reabsorption of water in the renal tubules
Vasoconstricts because it is also called vasopressin
what is the most important stimulus to ADH secretion?
what is necessary for the synthesis of thyroid hormones?
what do T4 and T3 affect?
metabolic rate, caloric requirements, O2 consumption, cabs and lipid metabolism, growth and developmentm brain functions.
what are most of the thyroid hormones bound to?
What does calcitonin do?
inhibits loss of calcium from bone, increases calcium storage in bone, increases renal excretion of calcium and phosphorus thereby lowering serum calcium levels (calcium in blood) CALCINTONIN HELPS PARATHYROID HORMONE
the parathyroids secrete the parathyroid hormone. what does this hormone do?
regulates blood level of calcium
The adrenal glands consist of the medulla and cortex. What is the role of the medulla?
secretes catecholamines epinephrine (major hormone), norepinephrine, and dopamine.
What are catecholamines ususally considered?
neurotransmitters. but are considered hormones when released by medulla
The cortex secretes...
glucocorticoids, mineral corticoids, and androgens