Flashcards in SC8 #1 Cells Deck (19):
What are the characteristics of living thing
Responds to environment, reproduce, grows, gets rid of waste, needs energy
What is an example that responds to environment
Respond to hunger by eating
Examples of needing energy?
Plants need sunlight, water and carbon dioxide to make food
Example of growing?
Children grow taller, replace cells
Examples of reproducing?
Salmon lay eggs
Examples of getting rid of waste
Exhaling carbon dioxide, dead skin cells
What is the cell theory?
1)Cells are the basic unit of all life
2) all living things have one or more cells
3) all cells come from other living cells
What are prokaryotic cells and give an example
Cells that do not have organells with membrane around them, bacteria
What are eukaryotic cells and give an example
Cells that have organells with membrane around term (plant animal cells)
What's the difference between bacteria and viruses?
Bacteria can reproduce and viruses can't
What is cell membrane
What does selectively permeable mean
Let's some substances pass through but not others
What is contentration
The amount of substance in a certain place
When does diffusion happen
When particles move from a place of HIGH contentration to LOW contentration
What is osmosis
Diffusion of water
What do water particles move from
HIGH contentration to LOW concentration
Cells tissue organ organ system organism
What is tissue
Cells that have same structure and play the same role in the body