Homeostasis (LC 2027) (Leaving Cert Biology): Flashcards
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13 cards from this deck
Homeostasis
Homeostasis
Maintenance of constant internal environment
Human body temp constant
Human body temp constant
37°C
Transpiration
Transpiration
Loss of water vapour from aerial parts of plant
Ectotherms
Ectotherms
Animals that cannot maintain constant internal temp
Ectotherm examples
Ectotherm examples
Reptiles, insects
Endotherms
Endotherms
Animals that maintain constant internal body temp
Endotherm examples
Endotherm examples
Mammals, birds
Endotherm main heat source
Endotherm main heat source
Metabolic reactions
Hormone controlling endotherm metabolism
Hormone controlling endotherm metabolism
Thyroxine
Gland producing thyroxine
Gland producing thyroxine
Thyroid gland
Endotherm cooling: sweating
Endotherm cooling: sweating
Heat lost as water evaporates from skin
Endotherm warming: shivering
Endotherm warming: shivering
Skeletal muscles contract/relax, produce heat
Endotherm vs ectotherm eating frequency
Endotherm vs ectotherm eating frequency
Endotherms eat more often due to high energy needs