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• Homeostasis


  The process of actively maintaining fairly stable conditions necessary for survival in living things
• Claude Bernard, French Physiologist, first introduced the theory of homeostasis


  1805
• Negative Feedback Loop


  A process that regulates homeostasis
• Osmoregulation


  The regulation of water and electrolytic balance in the body to maintain homeostasis
• Walter Cannon derived the term "homeostasis" from the Greek words "hómaioe" and "histemi" meaning "similar" and "standing still"


  1865
• Stimuli


  • Felt by organisms' senses
  • Changes in the environment (internal and external)
  • Sensitive part of physiology
• Response


  • Behavior manifested by the organisms
  • Result of internal and external stimulus
• Osmosis


  • The process of passing of solvent from a low-concentration solution to a high-concentration solution
• French Physician who first coined the terms "endosmose" and "exosmose"


  Rene Dutrochet
• Types of solution


  • Hypertonic
  • Hypotonic
  • Isotonic
• Hypertonic


  More solute outside the cell, more solvents will exit the cell than enter
• Hypotonic


  Higher concentration of solutes and solvent inside the cell than outside the cell
• Isotonic


  The same concentration of solute and solvent inside and outside of the cell