BIO E105 Lecture Notes - Lecture 17: Petri Dish, Blood Sugar, Osmosis
Document Summary
Homeostasis: homeostasis is the maintenance of relatively constant internal environment. For example, we maintain a body temperature of about 37 c whether it"s cold or hot outside. 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. To achieve homeostasis, most animals have regulatory systems that constantly monitor internal conditions such as temperature, blood pressure, blood ph, and blood glucose. Cells grown on their own if they have right conditions. (in petri dish so to mimic conditions) Tissue culture: needs nutrients or food (energy, regulated temperature, correct ph (ph regulated by respiratory system, pancreas, kidneys, oxygen (respiratory & circulatory system, water (nervous system, room to grow, remove metabolic waste, salt concentration.
