Cell Theory Basics
Give me one statement from Cell Theory
1. All living things are made of cells.
2. Cells are the basic unit of life.
3. All cells come from existing cells.
Under a microscope, a leaf shows cells but a piece of paper does not. What does this mean?
The leaf is made of cells; the paper is not.
What is maintaining stable internal conditions inside a cell called?
Homeostasis
Double Jeopardy
“During a process called cellular respiration, cells break down sugars to release energy. In this process, water and carbon dioxide are produced as waste products. What must happen to these waste products in order for a cell to maintain homeostasis?”
Which part of cell theory explains how cuts heal?
Cells come from existing cells.
What tool did scientists use to determine if a newly discovered object is alive using cell theory?
a microscope
A space probe finds a strange structure. What must be true for it to be considered living?
It must be made of one or more cells.
What is a function do ALL cells perform to maintain homeostasis?
1. use energy
2. create new cells
3. get rid of waste
Why do unicellular organisms need homeostasis?
To stay alive.
If something is made of cells, what does that indicate?
It is (or was once) alive.
What do a unicellular organism (paramecium) and a multicellular organism (musk ox) have in common?
Cell Division
A student's cut heals over several days. What cell theory idea explains this?
Cells come from existing cells.
What must a cell do with carbon dioxide and water consumed?
Get rid of the waste products.
What happens if waste builds up in a cell?
The cell cannot function properly.
Double Jeopardy
“Why do cells expel carbon dioxide and water?
What part of the cell theory explains how a sea star regenerates a missing leg?
All cells come from existing cells.
If scientists cannot see cells when examining something, what might they conclude?
It may not be living because it's not made of cells.
What happens if a cell cannot remove waste?
It cannot maintain homeostasis.
In multicellular organisms, why must each cell maintain homeostasis?
So the whole organism can survive.
If a cell cannot remove waste, what will eventually happen?
It will die because it cannot maintain homeostasis.
According to cell theory, what separates living from non-living things?
All living things are made of cells.
True or False: All cells have a cell wall
False
Why must a runner’s muscle cells break down food during exercise?
To release energy to maintain homeostasis.
True or False: Cells change their shape to control temperature.
False
Why must microscopes be used when identifying life?
Because cells are microscopic.