2.4: Metabolism in conformers and regulators Flashcards
what are abiotic factors?
Temperature
pH
salinity
State what affects the ability of an organism to maintain its metabolic rate.
external abiotic factors
Describe in detail what a conformer is
an organism that uses the external environment to maintain its internal environment.
they use behavioural responses to maintain their optimum metabolic rate and have a low metabolic cost and a narrow range of ecological niches
Describe in detail what a regulator is
an organism that maintains its internal environment no matter the external environment
they use metabolism to maintain homeostasis
What is negative feedback
corrective response reverses the change
describe the role of homeostasis
it keeps regulators internal environments at a constant state
Describe the purpose of thermoregulation
to maintain at a constant temperature
Describe how thermoregulation is controlled
negative feedback
Describe the process of negative feedback
when the body has a change in temperature it has a mechanism put in place to reverse the change to normal
Explain how sweating decrease temperature
body heat used to evaporate water cooling the skin
What are the corrective responses to an increase in temperature?
Sweating
vasodilation (widening of blood vessels)
decrease metabolic rate
Explain how vasodilation decrease temperature
it increases blood flow to the skin and increases heat loss
Explain how increasing metabolic rate decrease temperature
less heat produced
Explain how shivering increase temperature
muscle contraction increases heat production
Explain how vasoconstriction increase temperature
it decreases blood flow to the skin decreasing heat loss
