The Cell

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Across
  1. 5. If the cell is in a solution that has a lower concentration of solute
  2. 8. are longer and less numerous than cilia
  3. 12. A supporting network of long, thin protein fibers that form a framework for the cell and provide an anchor for the organelles inside the cells
  4. 13. The secretion of materials at the plasma membrane
  5. 14. A distinct central organelle that contains the cell’s genetic material in the form of DNA
  6. 16. The organelles that help manufacture proteins
  7. 17. Cell Defined as cells without a nucleus or other membrane-bound organelles
  8. 20. A membrane system of folded sacs and interconnected channels that serves as the site for protein and lipid synthesis
  9. 25. A sac used to store food, enzymes, and other materials needed by a cell
  10. 26. The basic structural and functional unit of all living things
  11. 27. One of the fundamental ideas of modern biology and include the following principles: 1)All living organisms are composed of one or more cells 2)Cells are the basic unit of structure and organization of all living organisms 3)Cells arise only from previously existing cells, with cells passing copies of their genetic material on to their daughter cells
  12. 28. Organelles made by microtubules that function during cell division
  13. 29. Specialized structures that carry out specific cell functions
  14. 30. Protein Move needed substances or waste materials through the plasma membrane and therefore contribute to the selective permeability of the plasma membrane
  15. 31. The diffusion of water across the selectively permeable membrane
  16. 32. The site of ribosome production inside the nucleus
Down
  1. 1. The net movement of particles from an area where there are many particles of the substance to an area where there are fewer particles of the substance
  2. 2. Bilayer Two layers of phospholipids are arranged tail-to-tail
  3. 3. The semifluid inside the plasma membrane
  4. 4. Movement of substances across the plasma membrane against a concentration gradient requires energy
  5. 5. When the concentration of the solute outside of the cell is higher than it is inside
  6. 6. A special boundary that helps control what enters and leaves the cell
  7. 7. A thick, rigid, mesh of fibers that surrounds the outside of the plasma membrane, protects the cell, and gives it support
  8. 9. Equilibrium There is continuous movement but no overall change
  9. 10. Contains a nucleus and other organelles that are bound by membranes, also referred to as membrane-bound organelles
  10. 11. Are organelles that capture light energy and convert it to chemical energy through a process called thylakoids
  11. 12. Are short, numerous projections that look like hairs
  12. 15. Diffusion Uses transport proteins to move other ions and small molecules across the plasma membrane
  13. 18. A flattened stack of membranes that modifies, sorts, and packages proteins into sacs called vesicles
  14. 19. A model which shows how the phospholipids in the bilayer create a ¨sea¨
  15. 21. Permeability A membrane allows some substances to pass through while keeping others out
  16. 22. When a cell is in a solution that has the same concentration of water and solutes
  17. 23. The process by which a cell surrounds a substance in the outside environment, enclosing the substance in a portion of the plasma membrane
  18. 24. Energy generators
  19. 33. Are vesicles that contain substances that digest excess or worn-out organelles and food particles