Artery delivers blood to primary cap plexus. Chemical signals of body arrive in nerve terminals and are relaxed into primary cap plexus as they travel to secondary cap plexus through veins. At 2nd cap plexus, inhibiting/releasing factors may interact with glandular tissue of adenohypophysis. Hormones relaxed here are delivered to blood by veins that leave ant lobe
*look at picture
Function of intermediate lobe?
No function in adults
*located between ant and post lobe
Description of thryiod gland
Butterfly shaped gland in anterior neck
2 hormones thyroid gland produces?
Where does thyroid gland produce thyroid hormone?
From fluid filled follicles
Where does thyroid gland produce calcitonin?
From parafollicular cells located between the follicles
What are thyroid hormones invoked in?
General metabolic rate
Role of calcitonin ?
Involved in calcium balance
What are parathyroid glands
2-8 small glands located on the posterior side of the thyroid gland
What procures parathyroid hormone?
Chief cells/principle cells in parathyroid glands
What is parathyroid hormone invoked in?
Function of larger oxyphil cells?
Parathyroid hormone antagonist to
What does the thymus secrete?
Hormones involved in maturation of the immune system
Thymus AND chidlren
Very large in children after puberty it starts to become a fatty mass
Where are adrenal glands located?
Paired glands that sit on top of the kidneys
2 layers of adrenal gland
3 zonas in cortex of adrenal medulla
Zone in medulaa
adrenal cortex) what does each layer produce?
Different type of corticosteroid
mineralocorticoids; aldosterone (water balance)
glucocorticoids; cortisol (stress and metabolism)
gonadocorticoids ; androgens (puberty)
Medulla of adrenal gland is part of
Sympathetic ANS branch
Medulla from adrenal gland secretes
80 epinephrine to 20 Norepinephrine
Where is the pancreas located?
Partially behind the stomach, elongated shape
Both endocrine and exocrine functions
Pancreas ) cells of pancreas
Pancreatic islets or islets of Langerhans
Endocrine of pancreas )What do pancreatic islets secrete ?
Insulting and glucagon
What are pancreas cells related to endocrine?
Pancreas, endocrine portion: alpha cells secret
Pancreas, endocrine portion: beta cells secxret
Pancreas, endocrine portion: delta cells secrete
Pancreas, exocrine portion for digestion
acinar cells and duct cells
2 functions of gonads
*sperm or ova
*test or EST/progest
master controller of endocrine systems?
What is hypothalamus composed of?
Several clusters of neurons or nuclei
How does hypothalamus controls the ant lobe pit gland regarding released of hormones?
Portal system allows hypothalamus to send stop&go factors signals to ant lobe for control of master gland activity
Small intestine and stomach ) what do they contained?
contain gut-associated endocrine cells (enteroendocrine cells) to regulate digestion
***may be paracrine in nature or relaxed into vascular system
What do enteroendocrine cells release?
Several peptide hormones to regulate digestive functions
Kidneys: unidentified cells produce
Kidneys: what does Erythropoietin do?
Increases RBC production
Heart: what do specialized cardiac muscle cells produce?
atria natriuretic peptide (ANP)
Heart: what does ANP do?
Functions in controlling blood pressure
Placenta: what fdoees it produce?
-estrogen/progesterone and human chronic gonadotropin (hcG)