click below
click below
Normal Size Small Size show me how
Cells info
cells in anatomy
| Question | Answer |
|---|---|
| Cell Theory | A cell is the basic structural and functional unit of living organisms; The activity of an organism depends on the collective activities of its cells |
| Principle of complementarity | biochemical activities of cells are dictated by the relative number of their specific subcellular structures |
| Cell Diversity | More than 200 different cell types; structure drives function; Differ in size and shape, function, various organelles |
| Generalized cell | Nucleus, Cytoplasm, plasma membrane |
| Nucleus | control center and contains genes, contains nuclear envelope, nucleoli |
| Nuclear envelope | double membrane barrier with nuclear pores, and a fluid space between the two membranes allowing some but not all substances to pass, encloses the nucleoplasm |
| Nucleoli | where ribosomes are assembled |
| Chromatin | DNA and protein mix |
| Cytoplasm | the site of most cellular activities containing cytosol, organelles and inclusions |
| Cytosol | semitransparent fluid that suspends other elements |
| Organelles | metabolic machinery, synthesize proteins, package proteins, etc. |
| Mitochondria | carry out reactions using oxygen to break down foods, produce ATP |
| Ribosomes | site of protein synthesis |
| Rough endoplasmic reticulum | Cell’s membrane factory |
| Endoplasmic reticulum | Provides a network of channels for carrying substances |
| Smooth ER | lipid metabolism and detoxification of drugs and pesticides |
| Golgi apparatus | traffic director for cellular proteins, modifies and packages proteins |
| Lysosomes | digest waste material |
| Peroxisomes | contains enzymes that use molecular oxygen to detoxify harmful or poisonous substances, disarm dangerous free radicals, reactive chemicals that can scramble the structure of proteins |
| Cytoskeleton | protein fibers; cilia; flagella |
| Cilia | immobile, have tails, that move stuff |
| Flagella | mobile and propel stuff through cells |
| Inclusions | stored nutrients |
| Plasma membrane | the cell membrane that controls what enters and exits the cell |
| Tight junctions | impermeable |
| Desmosomes | anchoring junctions |
| Gap junctions | allow communication |