Psychology 3228 Chapter Notes - Chapter 12: Aids, Chemoreceptor Trigger Zone, Mental Disorder

• School: Western University
• Department: Psychology
• Course: Psychology 3228
• Professor: Scott Mac Dougall- Shackleton

Document Summary

Darwinian medicine: evolutionary psychopathology, evolutionary medicine, concerned with the ultimate (cid:498)why(cid:499) questions. Arms race: views adaptations on one side leading to counter-adaptations on the other, symptoms may be defense mechanisms adapted against pathogens. Morning sickness as an adaptation: to protect the embryo from toxins and micro- organisms found in food that might otherwise lead to deformities. Chemoreceptor trigger zone: are of brain stem that controls the nausea threshold. Bacteria: single-celled microbial organisms, some are free-living and some can only survive in or on bodies. Leucocyte endogenous mediator (lem): chemical in blood stream released by bacterial infections that leads to raising body temperature and iron withdrawal from the bloodstream to fight infections. Viruses: sub-microscopic consisting of a short strand of nucleic acid surrounded by a protein coat and can be subdivided into dna and rna viruses. Rna: common cold, which reproduces asexually and has symptoms that benefit both the host and the parasite (sneezing)