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Cellular structure and function
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are proteins in red blood cells that bind with oxygen.
Hemoglobins
provides the starting point for other necessary lipids such as vitamin D and the hormones estrogen and testosterone
Cholesterol
............................... are solid at room temperature
Saturated ( مشبع ) fatty acid
it exists in the hard-outer shells of shrimp, lobsters, and some insects
Chitin
provides structural support for the cell wall of plant cell
Cellulose
Are also called organic compounds
Macromolecules
are molecules made from repeating units of identical or nearly identical compounds called monomers that are linked together by a series of covalent bonds
Polymers
is another name for a homogeneous mixture
Solution
are mixture that can react with acids or bases to keep the pH within a particular range
Buffers
The measure of concentration of H+ in a solution
pH
spider climbing the windows due to
van dar waals force
adhesion property create
capillaries action
Molecules that have oppositely charged region
Polar Molecules
What are the two kinds of transport protein
carriers and channels
What kind of diffusion that substances uses transport proteins to move the substance across the plasma membrane
Facilitated diffusion
The diffusion of water across a selectively permeable membrane
Osmosis
Energy is required for diffusion because the particles already are in motion ( T \ F )
F
uphill transport is called
Active transport
kind of transport that diffuse down concentration gradient From (high) concentration to (low) concentration
Passive transport
What are the principles of the cell theory ?
All living organisms are composed of one or more cells , Cells are the basic unit of structure of all living organisms , Cells arise only from previously existi
He was the first to observe a living cell
Anton Van leeuwenhoek
organisms with only one cell are called .........................
unicellular
A cell was first discovered by
Robert hook
what did robert hook use to observe the cell ................
cork
is the basic structural and functional unit of all living organisms
The cell


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