Adrenal hormones Flashcards
what does the adrenal cortex secrete?
-corticosteroids
-mineralcorticoids
-sex hormones
Adernal Cortex is
essentail for life
the zona fasciculata secretion is regulated by what hormones?
CRH and ACTH
adrenal cortex secretes hormones that are made from __
cholesterol
what does the adrenal medulla secrete in response to sympathetic NS stimulation?
epinephrine and norepinephrine
adrenal medullary hormones are not essential for __
life
the zona fasciculata secretes __
glucocorticoids
(think “glu” is in the middle)
the zona glomerulosa secretes __
mineralocorticoid
GMC
what is the order from outer to inner of the aderenal cortex?
zona glmerulosa
zona fasiculata
zona reticularis
Good for rest
the zona reticularis secretion is regulated by the __
HPA
3 adrenal cortex layers (outer to inner)
-zona glomerulosa
-zona fasciculata
-zone reticularis
the zona glomerulosa secretion is regulated by the __
renin- angiotensin- aldosterone system (RAAS)
the zona fasciculata secretion is regulated by __
hypothalamic-pituitary-adrenal axis (HPA)
HPA regulates
zona fasciculata
zone reticularis
HPA is For Real
the two inner most
the zona reticularis secretes __
andRogens
steroid hormones in the adrenal cortex occur in the __
mitochondria or endoplasmic reticulum
aldosterone secretion is stimulated by
-angiotensin II
-increased K+ (hyperkalemia)
-decreased Na+
Aldosterone helps kindey to
keep Na+
secrete K+
KidNey
Aldosterone helps sweat and salivary glands to
retain Na+
adrenal medulla related to sympathetic NS, chromaffin cells secrete __
catecholamines (epinephrine and norepinephrine)
what cortex layer is the largest?
zona fasciculata
aldosterone increases renal tubular reabsorption of __ and secretion of __
Na+, K+
aldosterone leads to an increase in __
- EC fluid volume
- Mean Arterial Pressure
what causes the secretion of Aldosterone?
- Angiotension 2 (Low BP)
- High K+
- Low Na+
what enzyme is released by the kidneys?
renin
aldosterone has a similar effect on what compared to the renal tubules?
sweat glands and salivary glands
aldosterone greatly increases reabsorption of __
Na+
aldosterone effects sweat glands which is important to __
conserve body salt in hot temps.
aldosterone greatly increases secretion of __
K+
aldosterone effects the salivary gland by conserving __ during high salivation
Na+
what enzyme is produced by the endothelium in the kidneys?
Angiotensin Converting
Enzyme (ACE)
angiotensinogen-> angiotensin I by what enzyme?
renin
angiotensin I-> angiotensin II by what enzyme?
ace
order to know for angiotension to alosterone
- angiotensiogen
- angiotensin 1
- angiotension 2
- aldosterone secretion
what cells secrete renin?
juxtaglomerulus
in the kidney
what makes ACE?
endothelial cells
made all over the body but a lot is made in the lungs
angiotensin II leads to?
-vasoconstriction
-aldosterone secretion
-ADH secretion
-thirst stimulation
Vcon, Aldo & ADH secrete, thrist
Primary Hyperaldosteronism causes
-adrenal adenoma
-adrenal hyperplasia
-adrenal carcinoma
Conn’s Sydrome is
primary hyperaldosteronism
Primary Hyperaldosteronism treatment options
-surgical removal
-antagonism of mineralocorticoid receptor
Primary Hyperaldosteronism signs and symptoms
-hypertension
-hypernatremia
-headaches
-potassium depletion
-weakness, fatigue
-polyuria
-hypokalemic alkalosis
-low renin
Secondary Hyperaldosteronism caused by decreased __ and pressure in __
blood flow, renal artery
Secondary Hyperaldosteronism causes
-CHF
-cirrhosis
-nephrosis
-renal artery stenosis
Secondary Hyperaldosteronism signs and symptoms
-high renin
-hypernatermia (voluma expansion)
-edema
-decreased cardiac output
Hr HEDco
cortisol secreted with any __
STRESS
cortisol causes mobilization of __
energy stores
ACTH secreted so are other hormones because gene for ACTH forms __
larger protein
cortisol suppresses the __
immune response
cortisol secretion follows a __
circadian rhythm