PSYB64H3 Lecture Notes - Lecture 6: Vascular Organ Of Lamina Terminalis, Vasopressin, Lamina Terminalis
Document Summary
Temperature, regulation, thirst, and hunger : homeostasis, temperature, thirst, hunger, obesity & hunger disorders. Internal and behavioral elements to regain set point. Ectotherms body temp. same as environment = amphibians, reptiles and most fish. The higher an animal"s surface to volume ratio the harder it must work to maintain core temperature. Changes in position, weight, color and composition of fur. Water moves from an area with lower concentration of solutes to an area with higher concentration. The body"s fluids are held in three compartments. Sources of typical daily fluid loss and intake in humans. Occurs as a result of osmotic (drops in the intracellular fluid volume) and hypovolemic (drops in blood volume) thirst. Begins when angiotensin ii acts on subfornical organ (sfo) Antidiuretic hormone begins a sequence of events leading to fluid. Provides more sodium than other beverages, which helps athletes retain fluids and may prevent hyponatremia. An electrolyte disturbance in which sodium concentration is lower than normal.
