Across
- 2. fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cells
- 6. flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
- 12. network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement
- 15. group of tissues that work together to perform closely related functions
- 17. internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled
- 18. when comparing two solutions, the solution with the lesser concentration of solutes
- 19. cell organelle that stores materials such as water, salts, proteins, and carbohydrates
- 21. water channel protein in a cell
- 22. group of similar cells that perform a particular function
- 24. thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell
- 28. process of diffusion in which molecules pass across the membrane through cell membrane channels
- 29. specialized structure that performs important cellular functions within a eukaryotic cell
- 30. organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell
Down
- 1. diffusion of water through a selectively permeable membrane
- 2. fluid portion of the cell outside the nucleus
- 3. pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
- 4. group of organs that work together to perform a specific function
- 5. property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane
- 7. unicellular organism that lacks a nucleus
- 8. strong, supporting layer around the cell membrane in some cells
- 9. organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy
- 10. when comparing two solutions, the solution with the greater concentration of solutes
- 11. process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
- 13. relatively constant internal physical and chemical conditions that organisms maintain
- 14. basic unit of all forms of life
- 16. on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone
- 20. when the concentration of two solutions is the same
- 23. cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis
- 25. cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell
- 26. organism whose cells contain a nucleus
- 27. cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use