Definition
what is a cell?
the smallest functional and structural unit of all living things
What is the cell membrane?
a protective layer that covers a cell’s surface and acts as a barrier between the inside of a cell and the cell’s environment
Who was the first person to describe cells?
Robert Hooke
What is a lipid and what does it do for our body?
a fat molecule or a molecule that has similar properties
stores energy
What is a prokaryote?
organisms with no nucleus or membrane bound organelles
What is an organism?
any living thing
What is cytoplasm?
the region enclosed by the cell membrane that includes the fluid and all of the organelles of the cell
What is a phospholipid?
a lipid that contains a phosphorous
What is a protein and what does it do for our body?
a molecule made up of smaller molecules called amino acids
build and repair body structures and to regulate body processes
What is a Eukaryote?
organisms with a nucleus and membrane bound organelles
What is surface area to volume ratio?
the ratio of the cells outer surface area to the cell's volume
What is an organelle?
a small body in a cell’s cytoplasm that is specialized to perform a specific function
What is osmosis?
the movement of water through a semipermeable membrane
What is a carbohydrate and what does it do for our body?
molecules that include sugars, starches, and fiber
as a source of energy and for energy storage
What is an atom?
the basic building blocks of matter
What is a unicellular organism?
organisms that are made up of just one cell
What is DNA?
deoxyribonucleic acid, is the genetic material that provides instructions for all cell processes
Why are most cells small?
they take in nutrients and get rid of waste through their surface, which means they need a large surface are to volume ratio- meaning they need to be small
What are nucleic acids and what do they do for our body?
a molecule that carries information in cells
used to create DNA
What is a molecule?
a group of atoms that are held together by chemical bonds
What is a multicellular organism?
organisms that are made up of more than one cell
What is a nucleus?
a membrane bound organelle that contains the DNA
What is the cell theory?
all organisms are made up of one or more cells
the cell is the basic unit of all organisms
all cells come from existing cells
What is an enzyme?
are proteins that help chemical processes happen in cells
What is a compound?
a substance made up of atoms of two or more elements joined by chemical bonds