BIOL 1107 Lecture Notes - Lecture 97: Countercurrent Exchange, Nutrient, Osmoregulation
Document Summary
Homeostasis: homeostasis is the maintenance of relatively constant internal environment. Although conditions may vary as an animal"s environment changes, internal chemical and physical states are kept within a tolerable range: constancy of physiological state can be achieved by two processes: Two approaches to achieving homeostasis: conformational homeostasis is homeostasis that occurs by conformation to the external environment. For example, a dog maintains a body temperature of about. Why is homeostasis important: temperature, ph, and other physical and chemical conditions have a dramatic effect on the structure and function of enzymes. Most enzymes function best under a fairly narrow range of conditions: molecules, cells, tissues, organs, and organ systems function at an optimal level when homeostasis occurs. The role of regulation and feedback: to achieve homeostasis, most animals have regulatory systems that constantly monitor internal conditions such as temperature, blood pressure, blood ph, and blood glucose.
