Homestasis

homeostasis def

the maintenance of a constant internal environment to ensure optimum conditions, in response to internal and external changes

what is the human body temp

35 degrees celcius

what happens when a human’s body temp becomes too high

• sweat ,which is produced from sweat glands, evaporates to cool down the body

• vasodilation, blood vessels dilate so it is closer to the surface of the skin and so heat can be radiated

what happens when a human’s body temp becomes too low

• shivering - to generate heat from respiration

• hair stands erect to create an insulating layer and trap warm air

• vasoconstriction, when blood vessels constrict so less heat is loss via radiation

what does insulin do

lower blood sugar levels

what does glucagon do

it raises blood sugar levels by converting insoluble glycogen into soluble glucose

type 1 diabetes

caused when the body makes little or no insulin, caused by genetic disorders, cannot be cured

type 2 diabetes

caused when the body is unable to react to the insulin made, caused by obesity and poor lifestyle choices, can be cured via exercise

what does ADH do

more ADH produced = more uptake of water, less ADH produced = less water reabsorbed