angiotensinogen (blood protein)

renin : when extracellular fluid volume is low
and arterial blood volume is low,
and then renal artery blood pressure goes low,
and then juxtaglomerular cell in the kidney secretes renin


angiotensin 1

angiotensin converting enzyme(ACE)

angiotensin 2 (vasoconstriction, elevating blood pressure)



stimulates

hypothalamus

promotes secretion of

vasopressin

promotes action of

collecting tubule

promotes

reabsorption of moisture
vasoconstriction





promotes

adrenal cortex

secretes

aldosterone

promotes

reabsorption of Na ion in a distal tubule
blood osmotic pressure -> reabsorption of a moisture -> elevating blood pressure





angiotensin2

stimulates

anterior pituitary gland

secretes

ACTH(Adrenocorticotropic hormone)

stimulates

adrenal cortex

secretes

aldosterone


stimulates

posterior pituitary gland

secretes

ADH(Antidiuretic hormone, vasopressin)