Cell Membrane
Transports
ATP
100
The functions of the membrane are:
Boundary and Protection of the Cell Allows certain materials in and out of the cell (Selective permeable)
100
What is diffusion and to what transport does it belong to?
-Passive Transport - Movement of substances from an area of high concentration to an area of low concentration
100
What is ATP?
-Enegy used by all cells -Adenosine Triphosphate -Organic molecule containing high energy phosphate bonds
200
What is the structure of the membrane called?
Fluid Mosaic Model
200
What must exist for diffusion to take place? And what is the definition?
Concentration gradient -Differences in concentration of solutes between both areas
200
Chemical Structure:
-adenine -ribose -sugar -3 phosphates
300
The structure of the membrane is:
Phospholid Bilayer- only non polar molecules Transport Proteins- only polar molecules Glycoprotein Glycolipids Cholesterol
300
What is osmosis?
-Diffusion of water from an area of high water concentration to an area of low water concentration through a membrane
300
Name of process of getting energy from ATP and how do we get it?
Hydrolisis -Breaking high energy bonds between the last two phosphates in ATP
400
What is fluid? What is mosaic?
-Fluid: Individual phospholids and proteins can move side to side within the layer -Pattern produced by scattered molecules when the membrane is viewed from above
400
What are the three types of solutions and their definitions?
Hypertonic- Solution with less water and more solute, cell swells and eventually bursts Hypotonic- solution with more water and less solute, cell shrinks...animal cell- crenation...plant cell-plasmolysis Isotonic- both solutions have the same amount of water and solute, nothing happens to cell, facilitates diffusion from high to low concentration
400
How does the process happen?
Enzyme -ATPase
500
What is the phospholipid made of? Transport proteins? Glycoprotein (carbs attached to protein)? Glycolipids (carbs attached to lipid)? Cholesterol?
-2 fatty acids, phosphate group, glycerol (Only non polar molecules) -short molecules such as Na+, k+, amino acids, monosaccharides, and polar molecules to pass through membrane (polar molecules) -function in cell recognition, unique -Tissue recognition (blood typing) -Stabilizing the cell membrane by separating fatty acid tails
500
How is ATP Re-Made?
Reverse of the previous process occurs -Another enzyme is used -ATP synthetase
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