homeostasis and negative feedback

Negative feedback

restores systems to their original levels

Positive feedback

any response which amplifies a change from the norm

Factors kept constant by Negative feedback

core temperature

blood:

pH

Water potential

Glucose concentration

importance of regulation of blood glucose concentration

regulates blood water potential and availability of a key respiratory substrate

How Temperature and pH can affect the body

changing both can lead to enzyme efficiency being affected or being denatured

how water potential affects cells

can cause them to shrink or expand and burst by osmosis

How oxytocin causes positive feedback

oxytocin, causes contractions which causes pain which stimulates the nervous system to produce more oxytocin which increases contractions further