Chapter 18 Part 3 Endocrine Glands Flashcards
What are also known as surparenal glands
adrenal glands
What are located superior to the kidney, in the retroperitoneal area, are surrounded by adipose tissue
adrenal glands
The adrenal glands are very _____ organs
vascular
There is a central vein in each adrenal glands
The right drains into ____
the left drains into ______
IVC
Left Renal vein
What are the 3 parts of the adrenal cortex?
zona glomerulosa
zona fasciculata
zona reticularis
what part of the adrenal cortex is small cell clusters
zona glomerulosa
Mineralcorticoids =
aldosterone
What part of the adrenal cortex is the thickest layer, with long columns
Zone fasciculata
glucocorticoids =
cortisol
What part of the adrenal cortex is thin, irregular cords and cells
zone reticularis
gonadocorticoids
angrogens
What part of the adrenal gland is made of nervous tissue
adrenal medualla
The adrenal medulla produced catecholamines in what percentage
Epi - 80%
Norepi - 20%
The adrenal cortex secretes
Corticosteroids
What have a long hald life, lipid soluble, and are slow acting
corticosteroids
What have short half life and are fast acting with neural control
catecholamines
What is the primary mineralocorticoid and is regulated by renin-angiotensin
aldosterone
what is the target of aldosterone
kidney
(reabsorbs salt and H20)
What role of aldosterone is to …
regualte ion blance in the blood of Na and K
If there is excess aldosterone there is
low blood K+ and alkalosis
What is regulated by - feedback circadian ACTH release as a stress repsonse
cortisol
What is the role of cortisol?
decreases inflammatory and immune response
When does cortisol blood levels peak?
shortly before rise
When is cortisol the lowest?
evening