click below
click below
Normal Size Small Size show me how
Science 17 and 18
science
Question | Answer |
---|---|
cell | most basic unit of all living things |
function | a job that an organ does |
Ribosome and mitochonderia are types of... | organelles |
eukaryote | organism that has a nucleus |
tissue | group of cells that work together to perform a function |
cell wall | only found in plant cells it keeps the cell together |
organ | group of tissues that perfrom a specific function |
What are the benefits of being multi-cellular | longer life, larger siaze, and specialized cells |
nucleus | in a eukaryotic cell it is where the DNA is kept |
What are the three parts of cell theory... | 1. all cells come from others cell 2. all living things are made from cells 3. cells are basic unit of life |
what does the surface area-to-volume ratio of cell limits... | size of cell |
what are the 4 levels of living things... | cells,tissues, organs, organ systems |
cytoskeleton | web of proteins in cytoplasm that keeps the cell membrane from collapsing |
Endoplasmic Reticulum | makes proteins and other materials |
Golgi Comlplex | packageas and transprts things in and out of the cell |
Do all organisms have organ systems? | no |
osmosis | like diffusion except it deals with only water |
diffusion | the proccess where molecules move from high concentration to low concetration areas |
feedback mechanism | cycle of events where the step is controlled by info fromt the previous step |
cellular respiration | oxygen is used to break down food |
fermintation | no oxygen is used to break down food |
The proccess where particles move through a membrane from a region of high concentration to a region of low concentration is... | active transport |
Are exocytosis and endocytosis examples of active transport or passive transport? | active transport |
What structures are needed for photosynthesis to occur? | chloroplasts |
cellular respiration what is needed for it to occur? | mitochonderia |
What are the three phases of the eukaryotic cell cycle? | interphase, mitosis, cytokinesis |
chlorophyll | traps light and is used to produce food for plants |
chloroplasts | food for plants is made here |
Chromosomes | guidlines for what the cell should do. Part of the DNA |
ER | makes lipids etc. |
Lysosome | breaks down food |
Ribosomes | make proteins and are found on the outside of half of the ER |