Regulation of water levels Flashcards
what is the regulation of water levels in our body called
osmoregulation
what are the modulators in osmoregulation
the hypthalamus and the pituraty gland and kidney cells
what are the receptors in osmoregulation
baroreceptors and and osmoreceptors in the hypothalamus
the osmoreceptor pathway to increase water levels
decrease in water levels - osmoreceptors detect increase in osmolality - hypothalamus causes release of ADH from pituaraty gland - increase in permiabilty of collecting duct and stimulation of cells in thirst centre - increase in consumption of fluid and reabsorbtion of water
What is ADH
antidiuretic hormone which controls the water content of our urine by increaseing the permiabilty if the collecting duct wall, allowing more water to pass from the kidney to the bloodtream
what is adh released from
the pituratry gland in the brain
baroreceptor pathway increaseing water level
barodetectors detect fall in blood pressure and volume - release of renin from kidney cells causing release of aldosterone- activation of sodium-potassium pumps, increasing reabsorption of sodium - increased reabsorption of water from kidney filtrate barorectors also trigger other pathway
what are the receptors of a decrease in water levels
baroreceptors detect an increase in blood pressure and volume and osmoreceptors detect decrease in osmolality
what is the modulator for an increase in water levels
the hypothalamus supresses release of ADH from the posterior pituitary gland
what are the effectors for a decrease water level
decreased insertion of aquaporins in the distal convoluted tubule snd collecting duct of the kidneys and the thirst centre is supressed
what is the response for a decrease in water levels
decrease of reabsorption of water from urine and decrease in consumption of fluid
