15.2 Thermoregulation in Ectotherms Flashcards
Regarding temperature, what two classes of animals are there?
Ectothermic
Endotherms
Name 5 things that affect body temperature.
Exothermic chemical reactions
Latent heat of evaporation
Radiation
Convection
Conduction
How to endotherms maintain a stable core temperature?
They rely on metabolic processes
How do ectothermic maintain stable core body temperature?
Use surroundings
Why do ectotherms that live in water not need to thermoregulate?
Because water has a high heat capacity.
Name 3 behavioural responses of ectotherms to increase core body temperature.
Bask in sun + orientate so large SA is exposed to sun
Contract muscles + vibrate
Conduct heat from warn ground
Name 3 behavioural responses of ectotherms to decrease core body temperature.
Shelter from sun + orient are body so small SA is exposed to sun
Minimise movement
Press bodies against cool surfaces
Name two physiological responses to external temperature changes.
Darker skin in warmer climates
Alter heart rate to increase/decrease metabolic rate
