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Chapter 1 Cells Everett 8th
Chapter 1 Cells Everett 8th
27
Science
8th Grade
01/11/2012

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Term
Chapter 1 Cells
Definition
Term
Mitochondria
Definition
Produce most of the energy needed by a cell
Term
Osmosis
Definition
The movement of water molecules through a selectively permeable membrane
Term
Cells in many celled organisms are
Definition
Often quite different from each other
Term
Nucleus
Definition
The control center of the cell
Term
The cell wall
Definition
Protects and supports the cell
Term
Active Transport
Definition
Occurs when energy is required to move materials through a cell membrane
Term
Diffusion
Definition
Occurs when molecules move from an area of higher concentration to an area of lower concentration
Term
Part of the cell theory states that
Definition
All cells are produced from other cells
Term
Anton von Leeuwenhoek
Definition
First scientist to observe what are now called bacteria
Term
What is the total magnification of a microscope with two lenses. One lens has a magnification of 15, and the other lens has a magnification of 30?
Definition
450 (30x15=450)
Term
Nucleus
Definition
The organelle that is the control center of the cell
Term
Function of the cell membrane
Definition
To control what enters and leaves the cell
Term
Bacterial cells are different from plant and animal cells because
Definition
They do not have a nucleus
Term
Vacuole
Definition
An organelle that is used as a "storage locker" for the cell
Term
The diffusion of WATER molecules through a selectively permeable membrane is called osmosis
Definition
Term
Cell Membrane
Definition
allows materials to pass into and out of a cell
Term
Active transport requires a cell to use
Definition
ENERGY
Term
Chromatin
Definition
Thin strands in the nucleus of a cell that contain genetic material
Term
Ribosomes
Definition
Small grain-like bodies that produce proteins inside cells
Term
The cell theory states that
Definition
All organisms are made up of CELLS
Term
The genetic material in a bacterial cell is not found in the
Definition
Nucleus
Term
Plant and bacterial cells both have a
Definition
Cell Wall
Term
The DIFFUSION of water molecules through a selectively permeable membrane is called osmosis.
Definition
Term
Be able to identify the following parts of a cell and tell their function
Definition
ER-Endoplasmic Reticulum=transports, Mitochondria=provides energy,
Nucleus=tells a cell what to do,
Cell Membrane=Controls what enters and leaves the cell
Term
Be able to tell what will happen to red blood cells if they were placed in water with very little salt, very salty water, and plasma
Definition
Red blood cells in water with very little salt will puff up. Red blood cells in very salty water will shrink. Red blood cells in plasma will stay the same.
Term
An egg is 90% water and corn syrup is 25% water. Know what will happen if you put an egg in corn syrup. Be able to name the process and explain what happens.
Definition
If you put an egg in corn syrup osmosis will occur. The water will leave the area of high concentration (egg) and move to the area of low concentration (corn syrup). The egg will become flabby.
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