BIOL 1070 Lecture Notes - Lecture 17: Respiratory Rate, Acclimatization, Ethylene Glycol
12 Oct 2016
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Arctic plants and animals have lived in the arctic ecosystem for thousands of years. They must cope with temperature change on many different time scales: acute. Eg: normal = daily fluctuation in temp. Biological response: behavioural adjustment (eg: sit in water), physiological response (eg: sweating), death: chronic. Eg: normal = seasonal fluctuation in temp. Biological response: migration, acclimatization, death: general (evolutionary) Eg: normal = gradual climate change (eg: ice ages). In an ice bath: heart rate increases. Did he need to go in an ice bath or could he have experimented with something less extreme: eg: moving to winnipeg, turning down the thermostat. What will happen to them when temperatures change: temp increase: Fish: body fluids freeze at -. 6 to -1. 1 c: seawater freezes at -1. 9 c. Observation: fish doesn"t freeze in sub-zero water. You would need proof that it prevents freezing. The graph shows that as the [antifreeze protein] increases, the freezing point of plasma decreases.
