Topic 4: Metabolism in Conformers and Regulators Flashcards
What effect can external abiotic factors have won an organism?
The ability to maintain its metabolic rate
What are some examples of external abiotic factors?
Temperature, salinity, pH
What is a conformers internal environment depending on?
It’s internal environment is dependent upon its external
How do you conformers maintain optimum metabolic rates?
By using behavioural responses
How do you conformers his behavioural responses affect their metabolic rate?
The behavioural responses allow them to tolerate variation in the external environment to maintain optimum metabolic rate
What are the metabolic costs of a conformer?
low
Do conformers have a wide or narrow ecological niche?
A narrow ecological niche
Regulators can maintain their internal environment regardless of ________?
Regardless of the external environment
How do you regulators control their internal environment?
By using metabolism
Regulators using metabolism increases the range of what for the species?
Increases the range of possible ecological niche as they can survive in
What happens to the metabolic costs to achieve homoeostasis through regulation?
The metabolic cost increases
How does Thermoregulation occur by?
Through negative feedback
What is the temperature monitoring centre?
Hypothalamus
How is information communicated by the hypothalamus?
Electrical impulses through nerves to affecters, which bring about corrective responses to return temperature to normal
What are some corrective responses to an increase in body temperature?
Sweating, vasodilation, decrease metabolic rate
How does sweating reduce body temperature?
Body heat is used to evaporate water in the sweat, this cools the skin
How does vasodilation reduce body temperature?
Increase bloodflow to the skin increases heat loss
How does a decrease in metabolic rate reduce body temperature?
Because less heat is produced
What are correct of mechanisms to decrease body temperature?
Shivering, vasoconstriction, contraction of hair erector muscles, increase in metabolic rate
How does shivering increase the body temperature?
Muscle contraction generates heat
Vasoconstriction increases body temperature because?
A decrease bloodflow to the skin decreases heat loss
How does an increase in metabolic rate increased body temperature?
Because more heat is produced
What is the importance of regulating temperature?
To maintain temperature is for optimal enzyme activity and maintain high diffusion rates for metabolism
