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ch3 science test
cells, mmicroscopes, and dissections
| Term | Definition |
|---|---|
| cell | smallest unit that can perform life's processes covered by membrane and have DNA& cytoplasm |
| cell membrane | phospholipid layer that covers cells surface; it is a barrier between inside of cell & environment |
| organelles | 1 of the small bodies in cell cytoplasm that are specialized to perform functions |
| cell size | large cell: egg yolk small cell: mostly small cells |
| surface-area-to-volume | 1. find surface area 2. find volume 3.surface area divided by volume |
| nucleus | eukaryotic cell membrane bound organelle contains DNA & role in process : growth, metabolism, reproduction |
| prokaryotes | organism that consists of single cell that doesn't have nucleus |
| eukaryotes | organism made up of cells that have nucleus enclosed by membrane includes animals, plants, fungi ,not arch bacteria/eu bacteria |
| cell wall | rigid structure that surrounds cell membrane & provides support to cell |
| cellulose | complex sugar hat most animals cant digest |
| golgi complex chitin | some fungi have cell walls made of chitin |
| cytoskeleton | web of proteins in cytoplasm |
| ribosomes | cell organelle composed of RNA and protein cite of protein synthesis |
| endoplasmic reticulum (ER) | system of membrane found in cells cytoplasm & assists production, processing, transports proteins in production of lipids |
| mitochondrion | cell organelle surrounded by membranes and site of cellular respiration |
| Golgi complex | helps make and package materials to transport out of cell |
| vesicle | small cavity or sack that contains materials in eukaryotic cell |
| chloroplast | organelle in plant and algae cells in which photosynthesis takes place |
| lysosomes | cell organelle that contains digestive enzymes |
| vacuole | large vesicle holds water and other materials |
| arm | attaches eyepiece and body tube to base |
| base | supports microscope |
| coarse focus adjustment | knob that makes large adjustments to focus **********ALWAYS LEAVE POWER ON LOW FOCUS*********** |
| diaphragm | adjustable opening under stage allowing different amounts of light on stage |
| eyepiece | the place where you put your eye |
| fine focus adjustment | knob that makes smaller adjustments to focus |
| high- power objective | large lens with high magnifying power |
| inclination joint | adjustable joint that lets arm tilt at various angels |
| low- power objective | small lens with low magnifying power |
| light source | directs light upwards onto slide |
| revolving nosepiece | rotating device that holds objectives (lenses) |
| stage | platform on which a slide is placed |
| stage clips | metal clips that hold slide securely onto stage |
| dissection | cutting open dead organism to investigate its anatomy |
| vivisection | vivi-life cutting open living organism to investigate anatomy and phycology |
Created by:
beanierocks
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