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Chpt 7 SCIENCE
Life is Celluar
| Question | Answer |
|---|---|
| Cell theory | all living things are composed of cells, cells are the basic structure and function of living things and new cells are produced from existing cells |
| Cell Membrane | thin, flexible barrier around the cell, protection and support |
| Cell Wall (plant) | strong layer surrounding the cell membrane. made of fiber and protein. |
| Nucleus | large structure in the middle of the cell that has the genetic material and controls all the cell activities. DNA information, makes proteins |
| Cytoplasm | material inside the membrane that is liquidity and contains the other cell structures |
| Eukaryotes | have dozens of organelles , has nucleus, membrane and cytoplasm |
| Prokaryote | smaller and simpler, all bacteria, has no nucleus |
| Nucleolus | ribosomes aid in the production of proteins with in the cell, Assembly of ribosomes |
| Nuclear Envelope | double membrane, sends a stream of RNA allows material in and out of the cell through pores |
| Cytoskeleton | helps support cell, a network of protein filaments maintain shape, involve in movement, important in cell division |
| Microfilaments | long thin fibers that function in the movement and support of the cell |
| Endoplasmic Reticulm | organelle in which components of the cell membrane are assembled and proteins are modified, rough - ribs are present soft= enzymes preform tasks with lipids |
| Golgi Apparatus | enzymes attach carbs to lipids to proteins |
| Lysosomes | break down lipids, carbs and proteins from food into particles used for cells, break down old organelles that are not useful |
| Vacuoles | water, salts, proteins and carbs are stored in, plants have large central and vesicles are smaller and transport substance with in the cell |
| Chloroplasts | energy from sunlight to make energy rich food molecules in a process of photosynthesis |
| Mitochondria | energy from food to make energy compounds that cell can use to power growth plant cells |
| Diffusion | regulates the movement of molecules, causes many substances to move across but does not require e energy, move to area where they are more concentrated to an area where they are less concentrated |
| Osmosis | diffusion of water through a selectively permeable membrane, |
| Selectivity Preamble | when some substances can pass across the membrane while others cannot -> impermeable |
| Isotonic | same strength |
| Hypertonic | above strength |
| Hypotonic | below strength |
| Osmotic pressure | pressure on the hypertonic side of a selectively permeable membrane |
| Facilitated Diffusion | hundred d of different protein channel shave been found that allow ions sugars and salts to cross various membrane |
| Active Transport | material that moves from an area o f lower concentration to an area of greater concentration NEEDS ENERGY |
| Phagicytsosis | large particles taken |
| Excotyosis | removal of large amounts of material |
Created by:
natalieswisher
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