Cell Theory
What is the basic building block of all living things?
cell
Plant cells contain these green organelles to make food, but animal cells do not.
Chloroplasts
This organelle acts as the "brain" or control center of the cell.
Nucleus
This system breaks down the food you eat into nutrients.
Digestive
What is the smallest living level of organization?
cell
True or False: All cells come from pre-existing cells.
True
Plant cells have this rigid, outer protective layer that animal cells lack.
Cell wall
Known as the "powerhouse," this organelle releases energy from food.
Mitochondria
This system absorbs oxygen from the air when you breathe.
Respiratory
The heart, stomach, and brain are all examples of this level.
If an organism is made of only one single cell, it is called what?
Unicellular
Plant cells usually have one giant one of these to store water, while animal cells have many small ones.
Vacuole
This thin barrier controls what goes in and out of the cell.
Cell membrane
This system uses blood to pump oxygen and nutrients around the body.
Circulatory
A group of similar cells working together forms this.
Tissue
Why do we need a microscope to see individual cells?
They are too small / microscopic.
True or False: Both plant and animal cells have a cell membrane.
True
This is the jelly-like fluid that fills the cell and holds organelles.
Cytoplasm
These two systems work closely together to help your arm bend or legs run.
Skeletal and Muscular Systems
Put these in order from largest to smallest: Tissue, Organism, Cell, Organ System, Organ.
Organism, Organ System, Organ, Tissue, Cell
You might only notice this itchy fungus if it causes Athlete's foot, but because it is made of many complex cells that contain a nucleus, it fits into these two classifications—one starting with E and the other with M.
Eukaryotic and Multicellular
Why do plant cells need a square, rigid shape while animal cells can be round and flexible?
Plants don't have bones/skeletons, so the cell wall gives the plant structural support.
A cell is exposed to a toxin that pokes holes in its cell membrane. What critical cellular job is now failing, and what will happen to the cell?
It can no longer control what goes in and out, allowing harmful things to enter.
When you eat a slice of pizza, this system breaks the food down into nutrients, while this other system acts like a delivery highway to carry those nutrients to the rest of your body.
While running in gym class, Laken trips and scrapes his knee. The injury damages some skin cells, which ruins a patch of skin tissue. Name the organ that was hurt, and name the organ system it belongs to.
The organ is the skin, and the organ system is the integumentary system.