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Cell Structure
| Question | Answer |
|---|---|
| Name the parts of a cell | Cell membrane, cytoplasm, organelles, nucleus |
| acts as a barrier; separates intra-cellular and extra-cellular compartments, selectively permeable, and provides some structure. | cell membrane |
| gel-like internal environment of the cell | cytoplasm |
| subcellular structures within the cytoplasm; perform specific functions | organelles |
| contains the cell's DNA. | Nucleus |
| Composed primarily of phospholipids and proteins. | Cell Membrane |
| ____ can form a bilayer. | Phospholipids |
| restricts the passage of water and water-soluble molecules and ions | bi-layer of phospholipids |
| Membrane proteins provide specific functions. name the functions | transporters- water soluable molecules channels- allows passage way receptors- hormones enzymes **Mostly Lipid** |
| Out of the cell | Exocytosis |
| Inside of the cell | Endocytosis |
| two types of endocytosis | Phagocytosis and pinocytosis |
| surround and engulf particles, white blood cells and macrophages | phagocytosis |
| cell membrane invaginates, fuses together and then pinches off, entering the cell. | pinocytosis |
| tiny, hairlike structures that protrude from the cell, coordinated movement, within the respiratory system and the female reproductive tract. | cilia |
| single whip-like structure that propels the sperm cell through its environment | flagellum |
| numerous tiny folds in the cell membrane increase surface area (diffusion) | microvilli |
| membrane bound organelles that contain digestive enzymes | Lysosomes |
| fuse with food vacuoles to digest products of endocytosis | Lysosomes |
| Most cells contain hundreads to thousands of these organelles | Mitochondria |
| play an important role in the production of energy for the cell | mitochondria |
| Contains ribosomes (bumps of protein) | Rough Endoplasmic Reticulum |
| important role in protein synthesis | Rough Endoplasmic Reticulum |
| storage of Ca2+ in striated muscle cells | smooth Endoplasmic Reticulum |