BIOL 1202 Chapter : Animals
Document Summary
Animals: homeostasis and the organization of the animal body, homeostasis: tendency of all living things to maintain their structure and regular their internal environment. Occurs in individual cells and in the entire body. Two main types: negative feedback- a change in one direction causes a series of events in the other direction to counteract the change, examples. Biological: body temperature- change in body temperature is counteracted by body to bring temperature back to 37 degrees c in order to maintain homeostasis. Physical: house thermostat: all about sensors and effectors, positive feedback- initial change in one direction sets off a series of events that intensifies a change in that same direction, not many direct human examples of positive feedback. Cells come together, differentiate, mature --> become tissues found throughout body --> form organs --> form organ systems --> multicellular eukaryotic organism (animal: cells --> tissues --> organs --> organ systems --> body.
