Adrenal Glands Flashcards
Who secretes steriod hormones coming from the cortex and medulla of adrenal glands?
ACTH hormone. arrives from anterior pituitary to adrenal glands and secrete hormones of cortex and medulla
ACTH will bind receptors on adrenal cortex and makes them take up ….
cholesterol from the blood
Using cholesterol taken up by blood , it uses it to form what?
aldosterone(mineralcorticoid) and cortisol(glucocorticoid)
Mesoderm forms the 90% of the adrenal gland, which is?
Cortex
Endoderm(neural crest) forms the 10% of the adrenal gland, which is ?
Medulla
Adrenal Cortex composed of :
3 zones
- zona glomerulosa
2.zona fasciculata
3.zona reticularis
Adrenal cortex hormones are?
Mineralcorticoids (by glomerulosa)
Glucocorticoids(by fasiculata)
Mineralcorticoids control what?
Ions. Control electrolytes (Na or K)
ex: Aldosterone
Glucocorticoids control what?
manage glucose concentration.
Adenodaibetics (give high glucose and low glucose uptake)
ex: Cortisol
Blood Supply of the Adrenal glands is through which arteries?
superior,middle and inferior suprarenal arteries
Blood circulates the adrenal gland going from… and then…
going from outer cortex into inner medulla (following sinosuid system)
What does angiotensin 2 stimulate?
Stimulate zona glomerusa
What does ACTH (from adenohypophysis) stimulate?
Zona fasiculata and zona reticularis
What is an example of Acute Regulation?
Acute= rapid production
production of Glucocorticoids for (stress) and aldosterone (regulate blood pressure).
What is an example of Chronic stimulation?
Chronic= takes longer
synthesis of different enzymes
Prolonged starvation and chronic disease
