Adaptations for Cold Environments (VCE SSCE Biology): Flashcards
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4 main challenges of cold environments
4 main challenges of cold environments
Low temp, piercing winds, low nutrients, precipitation as snow
3 types of adaptations in cold-adapted animals
3 types of adaptations in cold-adapted animals
Structural, physiological, behavioural
Effect of low SA:V ratio on heat loss
Effect of low SA:V ratio on heat loss
Animals with lower SA:V release heat more slowly
Definition of torpor
Definition of torpor
Physiological state with reduced metabolism to conserve energy
What is vasoconstriction?
What is vasoconstriction?
Narrowing of blood vessels in skin to reduce heat loss
Purpose of countercurrent circulation
Purpose of countercurrent circulation
Warm arterial blood heats cool venous blood from extremities
Why can't plants use behavioural adaptations?
Why can't plants use behavioural adaptations?
Cannot seek shelter, huddle, or migrate
How plants achieve freezing point depression
How plants achieve freezing point depression
Increase solute concentration (e.g. glucose) in cells
Definition of deciduous tree
Definition of deciduous tree
Tree that seasonally drops all leaves to avoid harsh conditions
Where water freezes in wood frog's strategy
Where water freezes in wood frog's strategy
Extracellularly; intracellular fluid stays liquid via solutes