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Chapter 3 part 1
cell structures and functions
| Question | Answer |
|---|---|
| What are the 6 functions of cells? | 1. Basic unit of life 2. Protection and Support 3. Movement 4. Communication 5. Cell metabolism and energy release 6. Inheritance |
| What are Organelles? | "Little organs" within the cells that carry out the basic functions. Located between the cell membrane and nucleus in the cytoplasm. |
| What is the cell membrane/plasma membrane? | The outermost component of the cell. Functions as a barrier between the extracellular substance (outside) and the intracellular substance (inside) |
| What is extracellular substance? | Substances outside of the cell |
| What is intracellular substance? | Substances inside of the cell |
| What is a Fluid Mosaic Model? | Model used to show the structure and function of the cell membrane |
| What is the nucleus? | Cell organelle that contains the hereditary information in the form of DNA The site where RNA is copied from DNA |
| What is the nucleolus? | Place where ribosomes are made. Center of the Nucleus |
| What is the Rough Endoplasmic Reticulum (Rough ER)? | The membraneous network inside the cytoplasm that has ribosomes attached to the surface. |
| What is the Smooth Endoplasmic Reticulum (Smooth ER)? | The membraneous network inside the cytoplasm that does not have ribosomes attached. |
| What is the Golgi Apparatus? | Stacks of flattened sacks, formed by membranes, that collect, modify, package, and distribute proteins and lipids. |
| What are Lysosomes? | Membrane-bound vesicle containing intracellular digestive enzymes |
| What is Mitochondrion? | Small, spherical, rod-shaped or thin filamentous structure in the cytoplasm that is a major site of ATP production. |
| What are Microtubules? | Hollow structures formed from protein subunits that perform a variety of roles, such as helping to provide support to the cytoplasm, assists in the process of cell division. |
| What are Cilia? | They project from the surface of cells, are capable of moving, and vary in number from none to thousands per cell. They move mucus away from the lungs. |
| What is the Flagella? | There is usually only one per cell. It functions to propel cells. |
| What is the Microvilli? | Specialized extensions of the cell membrane that are supported by microfillaments. |
| What are Ribosomes? | Organelles where proteins are produced and synthesized |
| What is the Cytoskeleton? | Consists of proteins that support the cell, hold organelles in place, and enable the cell to change shape. |