MCELLBI 32 Study Guide - Comprehensive Midterm Guide: Homeostasis, Covalent Bond, Hypothalamus

• School: Berkeley
• Department: Molecular And Cell Biology
• Course: MCELLBI 32
• Professor: Robin Ball

Document Summary

Homeostasis: the ability of organisms to keep a relatively stable internal environment in the face of changing external conditions: acts on extracellular fluid to maintain the balance of water and solutes in the blood, example: the body works to maintain a core body temperature of 37 c. Integrating center in this process--> sees the change and decides what to do. C: temperature goes above/below=stimulus, temperature goes above/below=stimulus, heating system=effector, heater turning on/off=response. Amplifies: the stimulus leads to a response, and this response further amplifies the stimulus, this gets rid of homeostasis. Example: luteinizing hormone surge during ovulation: ovaries release estrogen, which stimulates the pituitary gland to release lh, which stimulates the ovaries to release more estrogen > this cycle continues on and on to release more and more estrogen, leading to the release of an egg, homeostasis here is removed and the response is amplified.