Large land mammals of the Arctic endure very low ambienttemperatures and stand on frozen ground for long time periods. Thiscan result in large differences in temperature across the body. Thetissue temperature in the extremities (feet and lower legs) can beup to 25oC cooler than in the thorax.
(4pts) Draw the Hb-O2 equilibrium curve and indicate on thegraph what the usual effect of increases Âand decreases intemperature on Hb-O2 binding. Make sure to label your axes andcurves on the graph.
(4pts) What impact would temperature-dependent shifts have on O2loading in the lungs and O2 delivery to tissues in theextremities?
(8pts) Based on what you know about respiratory andcardiovascular physiology, describe in what ways (how) the anatomyand physiology of these artic mammals might be different frommammals from warmer climates to compensate for this?
(4 pts) Briefly describe why what you propose in (c) is adaptivefor these large arctic mammals.
