BIO210Y5 Study Guide - Quiz Guide: Histology, Electron Microscope, Blood Vessel
Document Summary
Homeostasis: presence of a stable internal environment. Therefore: any variation outside a specific narrow range triggers a response that restores normal conditions. 1. 13 feedback loops: negative feedback: effector activated by the control center opposes or negates the original stimulus. Negative feedback provides long-term control over body"s internal conditions, keeps body systems within limited ranges that are compatible with long-term survival. Therefore, small variations go unnoticed by negative feedback mechanisms. Regulatory process is dynamic: set point varies with changing environments, process adjusts to that. Doesn"t happen very often because the responses are extreme ex. Positive feedback loops found when dangerous processes must be completed quickly before homeostasis can be restored ex. Damage in blood vessel = chemicals released to begin blood clotting (positive feedback loop because as clotting continues more chemicals released that further accelerate the process) Anatomy: study of internal and external structures and the physical relationship among body parts.
