Homeostasis and Cells

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Homeostasis and Cells
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Homeostasis

• All living things
• are composed of cells,
• have the same basic chemical makeup,
• contain the same kinds of organelles.
• This does not mean that all living things are the
  same.
• Differences arise from the ways in which cells
  are specialized and the ways in which cells
  associate with one another to form multicellular
  organisms.

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Homeostasis

• Relatively constant internal physical and
  chemical conditions
• To maintain homeostasis, unicellular organisms
  grow, respond to the environment, transform
  energy, and reproduce.

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Homeostasis

• The cells of multicellular organisms become
  specialized for particular tasks and communicate
  with one another to maintain homeostasis.

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Levels of Organization

• Cell Tissue Organ Organ System

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Cellular Communication

• Receptors receive chemical messages from other
  cells to help coordinate activities.