BIL 360 Lecture Notes - Lecture 7: Ice, Phospholipid, Supercooling
22 Apr 2017
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Document Summary
Endothermy: animals tissues are warmed by metabolic heat. Ectothermy: external thermal conditions determine an animals body temperature. Thermoregulation: maintenance of a relatively constant tissue temperature. Poikilothers chronic responses to changing temperatures. Only partial compensation animal has tendency for rate to return rate returnin to previous levels after chronic exposure to temperature. Poikilotherms evolutionary responses to changing temperature: environments aniamls live in and the evolved physiological adaptations, molecular specialization: crystalline proteins of eye lenses are found in. Sprint speed in lizards example different molecular forms across related species that are suited to particular thermal conditions of each species: photoreceptor on retina. Under cold conditions the lenses in cow and soldierfish have become opaque influences transparency of the lens cataracts. The toothfish live at -2 c and crystallins are specialized to be that blind the animal functional at these temperatures. Different molecular forms allow functionality at different temperatures: synthesize different molecular forms according to temp conditions, phospholipids in membranes at different temps.
