PSYB64H3 Lecture Notes - Lecture 6: Diabetes Insipidus, Zona Incerta, Fluid Compartments
Document Summary
Motivation: a process that activates and directs behavior. Regulation of body temperature: set point, mechanisms for detecting deviation, internal and behavioral elements to regain set point. Adaptations to temperature: endotherms: maintain constant body temperature. Autonomic internal response to deviations in temperature. Blood vessels dilate: ectotherms: body temperature is the same as the environment. Changes in position, weight, color, and composition of fur. Multiple thermostats in the ns: spinal cord has a set zone between 35 and 39 degrees celsius, brainstem has a set zone between 36 and 38 degrees celsius. The lower it gets the more intense the responses (e. g. , shivering): hypothalamus has a set zone of 36. 5 to 37. 5 degrees celsius. Will adjust before brainstem and spinal cord. Deviations in human core temperature: fever: controlled increases in core temperature set point during illness, hyperthermia (heat stroke): occurs when core temperature increases due to failure of compensatory mechanism.
