Salt + Water Flashcards
What follows what?
Water follows sodium
What does mineralocorticoid activity relate to?
Sodium retention in exchange for potassium and/or hydrogen ions
What steroid mainly effects mineralocorticoid activity?
Aldosterone
Too little mineralocorticoid activity means what?
Sodium loss (which means water loss)
Where is ADH released?
Posterior pituitary
What does AVP stand for?
Arginine Vasopressin
What disorder can cause an increase in water loss causing High sodium levels?
Diabetes inspidus
What is SAID?
Syndrome of Inappropriate Antidiuresis
What are non-osmotic causes of SAID?
Hypovalaemia/hypotension
Pain
Nausea / vomiting
What is hypovalaemia?
Water deficit
What does hypovalaemia in hyponatraemia mean?
Too little sodium
Where is hypovalaemia most commonly seen?
Oedema
What does Addison’s disease effect?
The adrenal glands
What happens in Addison’s?
Not enough steroids Not enough mineralocorticoid activity Not enough sodium retention in kidneys Decreased ECF Excess pigmentation (ACTH whoch contaons MSH sequence)
