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Organization of Life (Cell Cycle)
Study guide; functions of cells and more in relation.
28
Science
7th Grade
02/09/2011

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Term
When water diffuses into or out of a cell
Definition
It is called Osmosis

WHY: Osmosis is the diffusion (spreading of high to low concentration)of water through a cell membrance
Term
Where does the Energy that is released by a cell's mitochondrion get stored
Definition
in ATP

WHY: ATP energizes other molecules in cells by transferring phosphate groups to those molecules. This helps cells perform three main kinds of work: mechanical work, transport work, and chemical work.
Term
A group of cells with the same function make up
Definition
tissue

WHY: Cells connect with other cells to make up tissues. Tissues connect and function with other tissues to make up organs. Multiple organs that work together make up an organ sytstem, which in return make an organism.
Term
What part of the cell forms a barrier between the cell and its environment
Definition
a cell membrane

WHY: A cell membrane controls the materials going in and out of a cell. This protects the inside of the cell from contact with harmful substances.
Term
Where does photosynthesis take place in the cell
Definition
In the chloroplasts.

WHY: Photosynthesis only takes place in plants. Chloroplasts are also only in plant cells.
Term
What is the smallest unit that can preform all the processes necessary for life
Definition
A cell
Term
Through what do materials go in and out of an organism's cells
Definition
cell membranes

WHY: Cell membranes are the UPS delivery system or the mailman. They check and control the materials go in and out and send them to the needed places.
Term
What are all organisms made of
Definition
cells

WHY: Cells are the basic building blocks of life.
Term
Photosynthesis allows
Definition
a plant to produce food (Glucose)

WHY: Plants (obviously) cant move so they use a readily availible energy source (the sun) to make food.
Term
An organ system has
Definition
two or more organs

WHY: Every organism needs multiple organs that work together to live.
Term
Where is chlorophyll located
Definition
in chloroplasts
Term
A cell moving particles with the use of energy is called
Definition
Active transport
Term
Human beings are
Definition
organisms
Term
The material that controls all cell activities is called
Definition
DNA

WHY: DNA has all of the "instructions" to copy itself and the entire cell. DNA is located in the "command center", the Nucleus
Term
The complex sugar cellulose is found in the cell walls of
Definition
Plants

WHY: Only plant cells have cell walls
Term
Binary fission, the process in which bacteria cell divide, means
Definition
Splitting into two parts

WHY: Bi means two. Fission means division. Therefore, The division into two.
Term
An organ consists of
Definition
two or more tissues
Term
What cell part supports the cell and might be made of cellulose and chitin
Definition
cell wall
Term
When particles travel from an area of high concentration to an area of low concentration, it is called
Definition
diffusion
Term
Most cells are very small because
Definition
their volume is limited by how large their surface is
Term
During the process of diffusion,
Definition
Particles move from areas of high concentration to lower concentration
Term
Most of a cell's ATP is made and stored in the inner membrane of the
Definition
mitochondrion
Term
What do all organisms need to get rid of in order to live?
Definition
wastes
Term
A cell's nucleus contains DNA, which carries gentetic material with
Definition
instruction for how to make proteins

WHY: DNA contains instructions for all neccessary processes
Term
Where do all cells come from
Definition
Cells

WHY: Cells go through a cycle in which they copy itself and splits in half
Term
Cells need to produce new cells in order to
Definition
replace the cells that have died
Term
What protects the inside of a cell from the outside world
Definition
cell membrane
Term
How do eukaryotic cells make more cells
Definition
mitosis and cytokinesis
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