3.6.4.1 Principles of homeostasis

Question 1

Describe Homeostasis in mammals

Answer 1

maintenance of a stable internal environment within restricted limits by physiological control systems

Question 2

examples of things homeostasis maintains

Answer 2

core temperature, blood ph, blood glucose conc, blood water potential

Question 3

explain the importance of maintaining stable core temperature

Answer 3

if temperature is too high : hydrogen bonds in tertiery structure of enzymes break, enzymes denature, active sites change shape and substrates cant bind, fewer enzyme-substrate complexes
if temp is too low: not enough kinetic energy so fewer enzyme substrate complexes formed

Question 4

explain the importance of maintaining stable blood ph

Answer 4

above or below optimum ph, ionic and hydrogen bonds in tertiary structure break
enzymes denature, active site changes shape, substrates cant bind
fewer enzyme substrate complexes