Biology Chapter 5 Terms

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Across
  1. 1. feedback, a cellular signaling mechanism in which the product of a particular process enhances the process itself
  2. 3. theory, One of the fundamental models of biology that states that cells are the smallest form of life, come from preexisting cells, are the basic building blocks of all life-forms, and carry out life processes to maintain homeostasis
  3. 4. diffusion, type of passive transport in which substances can move across a cell membrane through special protein channels embedded in the membrane
  4. 6. a structure found within the cytoplasm of cells that performs a specific set of functions in the cell that the cell needs to survive
  5. 7. transport, the movement of substances across a cell membrane from regions of low concentration to regions of high concentration by any means that requires the use of energy
  6. 8. solution, solution whose solute concentration is greater than the solute concentration of the cytoplasm in a cell
  7. 11. organism, an organism consisting of only one cell.
  8. 12. feedback, a cellular signaling mechanism in which the product of a particular process inhibits the process itself
  9. 13. solution, solution whose solute concentration is less than the solute concentration of the cytoplasm in a cell.
  10. 15. a thick fluid inside cells that contains the organelles
  11. 16. a protective coating found outside the cell walls of many bacteria
  12. 18. diffusion of water molecules through a semi-permeable membrane
  13. 23. transport, the movement of substances across a cell membrane without the need for energy
  14. 25. the internal balance with the systems of living organisms that must be kept stable in order to maintain life. Processes include, nutrition, expelling waste, and responding to environment
Down
  1. 2. an organism with cells having a true nucleus as well as membrane bound organelles
  2. 3. the structure with cells that helps define their shape, maintains internal organization, and aids in division and movement
  3. 5. organism, an organism consisting of two or more cells. These cells cannot live independently apart from the organism
  4. 9. A group of cells that live and work together. Unlike cells in a multicellular organism, cells in a colony may break away and survive on their own
  5. 10. a structure made of two or more tissues that work together to perform a particular function
  6. 14. a group of cells that are specialized to perform a particular function
  7. 17. the cellular organelle that directs the protein-building process
  8. 19. an organism with cells lacking a true nucleus and membrane-bound organelles
  9. 20. system, a group of two or more organs that work together to perform a particular function
  10. 21. solution, a solution whose solute concentration is equal to the solute concentration of the cytoplasm in a cell
  11. 22. the non-membrane-bound region in a prokaryotic cell that contains most of the genetic material
  12. 24. A whiplike cellular organelle similar in structure to a cilium but longer and used primarily for movement of many bacteria