Across
- 5. - having a lower osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
- 7. - found in both prokaryotic and eukaryotic cells; contains proteins and RNA attached to the ER or in the cytoplasm
- 11. diffusion - a type of passive transport in which substances move across a membrane through protein channels embedded in the membrane
- 13. - a structure made up of two or more tissues that work together to perform a specific function
- 15. - a group of cells that live and work together.
- 16. - an organelle transforms sugars into energy for the cell
- 17. - the structure within cells that helps define their shape, maintains internal organization, and aids in their division and movement.
- 20. membrane - a thin layer of phospholipids and proteins that defines the boundary of a cell.
- 21. - a cellular organelle that functions in the organization of microtubules.
- 24. bilayer - the two layers of phospholipids that make up the cell membrane
- 25. feedback - a cellular signaling mechanism in which the product of a particular process encourages the process itself
- 26. - a cell that does not have a nucleus or membrane-bound organelles
- 27. vacuole - an organelle found in plant cells that stores materials and helps maintain the cell’s shape through turgor pressure.
- 29. - a short, hairlike extension of a cell used either for movement or as a sensory organelle.
- 31. - a group of similar cells that work together to perform a specific function
- 32. - a whiplike organelle similar in structure to cilia but used primarily for the movement of bacteria.
- 34. - the membrane-bound region of a eukaryotic cell where genetic material is stored
- 36. - a type of vacuole in animal cells; digests foods, breaks down old parts of the cell, and kills bacteria and viruses.
- 37. wall - a rigid structure made by plants, fungi, and most bacteria to surround the cell membrane.
- 39. - having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
- 42. - The non-membrane-bound region in prokaryotic cells that contains most of the genetic material.
Down
- 1. - a spherical region within the nucleus where ribosomes are manufactured
- 2. - the internal balance in an organism that must be constantly maintained to keep the organism alive
- 3. - the thick fluid inside the cells that contain organelles.
- 4. apparatus - receives substances from the ER and sends them to other parts of the cell.
- 6. - a solution having the same osmotic pressure as some other solution, especially one in a cell or a body fluid.
- 8. Endoplasmic Reticulum - transports compounds around the cell and helps keep the cell’s shape; processes fats and breaks down toxic substances in liver cells
- 9. - found in the chloroplasts of plant cells, made of stacks of thylakoids which contain chlorophyll.
- 10. pressure - what makes living plant tissue rigid. Loss of turgor, resulting from the loss of water from plant cells, causes flowers and leaves to wilt.
- 12. - a cell that has a true nucleus and membrane-bound organelles
- 14. transport - any movement from areas of low concentration to areas of high concentration that requires energy
- 18. - structures found within the cytoplasm of cells that perform the various functions a cell needs to stay alive
- 19. - The diffusion of water across a selectively permeable membrane
- 20. - an organelle found in plant cells that contains the pigment chlorophyll and is where photosynthesis takes place.
- 21. - a protective coating found outside the cell walls of many bacteria.
- 22. organism - an organism consisting of only one cell.
- 23. feedback - a cellular signaling mechanism in which the product of a process inhibits the process itself
- 28. - a type of colorless plastid in plants and algae that contains starches, lipids, and proteins
- 30. system - a group of organs that work together to perform a specific function
- 33. organism - an organism consisting of more than one cell.
- 35. Endoplasmic Reticulum - transports compounds around the cell and helps keep the cell’s shape; has many ribosomes on its surface
- 38. - the genetic material of eukaryotic cells consisting of DNA and associated proteins
- 40. 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 processes to maintain homeostasis.
- 41. transport - the movement of substances across a cell membrane without the need for energy