6D Osmoregulation Flashcards
Equation
Total water change = Water intake + metabolic water – water output
Osmolality is…
total concentration of solute in a given weight of water
The regulation of water balance is called
Osmoregulation
Functions of water in the body
Urine production
Removal of waste heat through evaporation of sweat
Maintenance of blood volume
Brain and central nervous system protection
When water levels decrease…
Osmolality of blood increases
Blood pressure and volume decreases
Hypothalamus secretes ADH
Decreases in blood pressure and volume are detected by…
baroreceptors
Stimulus-Response Model (decrease in water levels)
Stimulus
decrease in water levels
Receptor osmoreceptors
Modulator hypothalamus
Effector
Thirst centre stimulated
Response
increased consumption of water
Increase in water levels causes a…
decrease in osmolality of blood
increase in blood pressure and volume.
Stimulus-Response Model (increase in water levels)
Stimulus
increase of water levels.
Receptor osmoreceptors
Modulator hypothalamus
Effector
thirst centre suppressed
Response
decrease in consumption of water
baroreceptors secrete…
renin from the kidneys
signal hypothalamus to secrete ADH
