science chapter one
Terms
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- simple microscope
- one lens ex magnifying glass
- endoplasmic Reticulum (ER)
- folded membranes some have ribosomes surrounding it (ROUGH ER) some are not(SMOOTH ER) transport network for molecules under construction
- compound microscope
- Has more thatn one lens ex light microscope
- electron microscope
- magnifies up to 100 times
- magnify
- objects appear larger
- cytoplasm
- gel like material surrounding organelles many chem. reactions take place here
- nucleus
- DNA found here contrals cell activity
- cell theroy
-
1 all living things are mad of cells
2 cells are the basic unit of structure and function in living things
3 all cells come from cells - organic chemical compounds
- anything living or once living or from something living and contians carbon
- cell organelle
- a part of a cell; has own structure which helps it do its own job
- chloroplasts
- contains pigment that turns plant green-site of photosynthesis only in plant cells
- bacterial cell
-
no nucleus have:
cell wall
cell membrane
ribosomes
cytoplasm - molecule
- smallest unit of compound
- cell
- basic unti of life
- compound
- two or more chem. combined elements
- atom
- smallest unit of an element
- lysosomes
-
vesicle contains enzymes to digest and clean up cell
only in animal cells - resolution
-
describes how much detail you can see
high resolution= good clear detail
low resolution= poor details; unclear - vacuole
- vesicle storage area for water, food and wastes plants have one big animals have lots
- cell wall
- only in plant cells cellulose gives wall rigid boxlike shape -channels that allow the passage of substances between cells
- ribosomes
- small round structures sit or protien synthesis
- cell membrane
-
found in animal and plant cells
surrounds and contains cell parts
plays imp. role in allowing substance to enter and leave the cell - golgi bodies
- modifies molecules and packages them into smaller sacs call vesicles
- element
- any substance that cannot be broken down into anything smaller
- inorganic chemical compounds
-
dont contain carbon ex water:most chemical reactions require this
helps cells hold shape and regulate temperature
not living has never lived - centrioles
- tubular structures occur in pairs control spindle formation in cell division only in animal cells
- mitochondria
- sit of cellular respiration