BIOL 3040 Chapter : Ch 20 LO
Document Summary
Clicker: in analyses of human disease, researchers may apply different levels of explanation. If their interest is in immediate mechanisms that cause pathology, they will use ______ explanations. 20. 2 fever: describe the proposed costs and benefits of fever in animals. Fever is widely observed among animals: endotherms and ectotherms, vertebrates and invertebrates. Treating fever with aspirin etc may prolong infection. May up-regulate some immune defenses and increase rate these cells proliferate and act. At the time when a bacterial infection is detected, the body doesn"t know just how severe the infection may be or turn out to be. Principal of asymmetric harm: it is better to have a false positive than a false negative. Especially when it comes to responding to infectious disease. Failing o initiate a defensive response when it is needed tends to be vastly more harmful than needlessly invoking a defense response when it is unnecessary.
