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21 Cards in this Set
- Front
- Back
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Lipid Bilayer |
Structural basis of all cell membranes; mostly phospholipids |
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Fluid Mosaic Model |
A cell membrane has a mixed composition of lipids, proteins, and the interactions that are fluid |
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Transport protein |
Membrane protein that passively or actively assists specific ions or molecules into or out of the cell |
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Receptor protein |
Binds extra cellular substances that can trigger change in cell activities |
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Concentration gradient |
Difference in the number of molecules or ions of any substance between two regions |
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Diffusion |
Random movement of molecules from great to least concentration |
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Selective permeability |
Built-in capacity of a cell membrane to prevent or allow specific substances from crossing it at certain times in certain amounts |
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Active transport |
Pumping a specific solute across a cell membrane against its concentration gradient through the interior of a transport protein |
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Passive transport |
Diffusion of a solute across a cell membrane, through the interior of a transport protein |
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Calcium pump |
Active transport protein; pumps calcium ions across a cell membrane against their concentration gradient |
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Osmosis |
Diffusion of water across a selectively permeable membrane from a region where the water concentration is high to a region that is low |
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Hypotonic solution |
Lower solute concentration |
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Hypertonic solution |
Higher solute concentration |
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Isotonic solution |
Equal solute concentration |
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Endocytosis |
Small patch of plasma membrane sinks inward and seals back on itself, forming a vesicle |
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Exocytosis |
A cytoplasmic vesicle fuses with the plasma membrane and contents are released outside the cell |
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What causes cystic fibrosis? |
A mutation of the CFTR gene |
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What does the reaction of phospholipids form? |
Lipid bilayer |
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What is the order of parts? |
Hydrophilic and then Hydrophobic parts |
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Why are membranes fairly impermeable? |
Cholesterol strengthens the plasma membrane |
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Describe the plasma membrane surface. |
Lipid Bilayer, mixed composition of phospholipids, glycolipids, sterols, and proteins |
