what does ur body temp rely on
the Thermoregulatory system
what does the thermoregulatory centre contain
• receptors that are sensitive to temp changes in the blood flowing thru the brain its self
in the hypothalamus
where does extra info come from about the temp of ur body
the skin receptors —> send impulses to the thermoregulatory centre
can sense a 0.5•C difference
what happens if your enzymes denature? 
-respiration stopped working causing death 
what happends when ur overheating simple
the body works on more energy being transferred to the surroundings to cool you down
what actually happens in the body when u overheating to cool you down
-blood vessels in the surface of ur skin dilate this is called VASODILATION=more blood to flow thru capillaries
•skin gets warmer so transfer more energy by radiation from ur skin to surr
-produce sweat—> water evaporates=cools ur body down
when this happends make sure to keep hydrated and have more mineral ions
what happens when u wanna stay warm in ur body
blood vessels in ur skin constrict to reduce the flow of blood. called VASCONSTRICTION=reduces the energy transferred by reaction thru the surface of skin
-sweat production= reduced
-skeletal muscles contract and relax rapidly causing you to shiver.
This needs a lot of respiration, exothermic process.
The energy transferred from this process raises ur body temp until shivering stops
what are the 2 main poisons waste products
carbon dioxide
urea
how is urea produces
excess amino acids in ur liver or when tissues are worn out
why do i need to control water in body
osmosis in animal cells = burst or shrink = won’t worknpropletly
what are the 2 processes that we can’t control the about of water lost
-water leaving the lungs when u exhale
-water, mineral ions, and urea lost thru skin in sweat
are are 3 process we can front on the amount of water lost
-urea, excess mineral ions and water are removed via kidneys then excreted in urne, regulated to:
•maintain the water and mineral ion content of the blood within narrow limits
•remove urea
what do the kidneys do if u are short on water
produce very little and concentrated urne and water is saved for use in body
what happends if you drink too much water
the kidneys will produce lots of dilute urine to get rid of excess
what moved thru the kidney and what doesn’t
-glucose, mineral ions and water all move out of the blood into kidneys
-the blood cells and large proteins are to big to leave the blood in the filtering process —> don’t go
-all glucose is transformed back into the blood by diffition and active transport
-the amount of water and dissolved montreal ions that are realised back into the blood varies—>depends on what is needed by your body = selective reabeotion
how is the water in the boood maintained at a constant level
the hormone ADH = secreted by pituitary gland
what does ADH do
- changes the amount of water reabroved by the kidhey tubules
what are the 2 options for kidney failure
transplant
regular sesstions of dialysis
what happends in a dyalsis machine
-the concentration of dissolved substances in the blood is restored to healthy levels
by using the right concentration gradients that make sure that toxins and unwanted substances move by diffusion out of the blood into dialysis fluid but keep useful ones
what diet to people on kidney dialysis need to keep
one that monitors proteins and salt
what are some disadvantages of dialysis
-person just follow diet
-person has to spend regular long sesstions connect to machine
- only short time that things are level so patient might feel tired or unwrel until next session
-over years it becomes more difficult to control balance
how to reduce infection of a kidney transplant
- match between the antigens of the doner snd patient
-immune support drugs
