6: reg of K Ca Mg P Flashcards
98% of body’s K is contained in the ___, where it is quickly moved into after being ingested
-excess is eliminated
cells
insulin, aldost, B-adrenergic stim, acid-base balance, cell lysis, strenuous exercise, increased extracellular fluid osmolarity all regulate the movement of:
potassium into and out of the cells
increased K intake stims ___ production, which increases cellular uptake of K
aldosterone
excess aldosterone in the system, hypokalemia is called ___ syndrome
conn’s
deficient aldosterone, hyperkalemia is called __ syndrome
addison’s
increased extracellular ___ ___ eventually causes diffusion of K out of cells and increases extracellular K levels
fluid osmolarity
insulin aldosterone B adrenergic stim alkalosis decreased EFO --factors that shift K \_\_\_ cells
into
insulin deficiency aldosterone defic B adrenergic BLOCKERS acidosis cell lysis strenuous exercise increased EFO --factors that shift K \_\_ cells
out of
65% of K is reabsorbed in the __ __, and daily variations are handled in the late distal tubules and coritcal collecting tubules
proximal tubules
___ cells in the late distal and collecting tubules secrete K for excretion in 2 steps
principal
___ stims active secr of K of the principal cells in the late distal tubules & collecting ducts, as well as increases the K ___ of the luminal membrane
aldosterone
permeability
powerful neg feedback system that aldosterone is involved with
aldosterone-potassium control system
in __ __, the activity of the Na-K ATPas pump is reduced, so K secretion decreases
acute acidosis
__ __ & ___ both lead to an increase in potassium secretion
chronic acidosis
alkalosis
only 50% of typical ___ intake is absorbed by the digestive system, which is more than is needed for normal daily function
-excess secreted by kidneys
magnesium
