PSYB64H3 Chapter Notes - Chapter 9: Zona Incerta, Preoptic Area, Posterior Pituitary
Document Summary
Week 5 june 9 th , 2015. To achieve homeostasis, regulatory systems defend set points: motivation: the process of activation and directing behavior. Endotherm: an animal that can use internal methods, such as perspiration or shivering, to maintain body temperature: e. g. , mammals and birds. Ectotherm: an animal that relies on external methods, such as moving into the sun or shade, for maintaining body temperature: e. g. , amphibians, reptiles, and fish. Have a larger surface area relative to overall body volume. Raynaud"s disease: a condition whereby blood vessel constriction is too extreme, which produces sudden spasms in arteries, particularly those in fingers and toes, in response to cold: the affected digits lose feeling and appear white. Fever: a carefully controlled increase in the body"s thermal set point that is often helpful in ridding the body of disease-causing organisms: pyrogen: a chemical produced by bacteria or viruses that contributes to the production of a fever.
