Membranes (Biology) at Saint Cloud State University | Flashcards & Summaries

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Lernmaterialien für Membranes (Biology) an der Saint Cloud State University

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TESTE DEIN WISSEN
What protein are inserted in the lipid bilayer?
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Globular Protein
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What is the Fluid Mosaic Model?
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The cell membrane is a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. 

This movement helps the cell membrane maintain its role as a barrier between inside and outside of the cell environment.
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TESTE DEIN WISSEN
What does the Cell Membrane consist of?
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Cholesterol, Phospholipids/Sphingolipids, Carbohydrates, and Protein.
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What is the Phospholipid Bilayer?
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A two-layered arrangement of phosphate and lipid molecules that form a cell membrane.

The hydrophobic lipid ends facing inward
The hydrophilic phosphate ends facing outward





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TESTE DEIN WISSEN
What is the Membrane Protein?
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TESTE DEIN WISSEN
Protein molecule that is attached to or associated with the membrane or the organelle
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What is Passive Transport?
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Transport is movement of molecules through the membranes which NO energy is required.
  • Moves high to low
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What is the Channel Proteins?
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TESTE DEIN WISSEN
Channel Protein spans the membrane and make hydrophilic tunnels across it, allowing their target molecules to pass it by diffusion.

  • Gated channels - open or close in response to stimulus (chemical or electrical)

Three conditions to determine direction:
  • Relative concentration on either side of the membrane
  • Voltage difference across the membrane
  • Gated channels - if the channel is open or closed.
Lösung ausblenden
TESTE DEIN WISSEN
What is Osmosis?
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TESTE DEIN WISSEN
Spontaneous net movement or diffusion of solvent molecules through a selectively permeable membrane from a region of high water potential to a region of low water potential, in the direction that tends to equalize the solute concentrations on the two sides.
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TESTE DEIN WISSEN
What is Osmotic concentration?
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Occurs when two solutions have different osmotic concentrations.
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What is Osmotic Pressure?
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TESTE DEIN WISSEN
The pressure that must be applied to the solution side to stop fluid movement when a semipermeable membrane separates a solution from pure water
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TESTE DEIN WISSEN
How does the Membrane maintain Osmotic Balance?
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TESTE DEIN WISSEN
Diffusion of water or solutes

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TESTE DEIN WISSEN
What is arranged in the bilayer?
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TESTE DEIN WISSEN
Phospholipids
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Q:
What protein are inserted in the lipid bilayer?
A:
Globular Protein
Q:
What is the Fluid Mosaic Model?
A:
The cell membrane is a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. 

This movement helps the cell membrane maintain its role as a barrier between inside and outside of the cell environment.
Q:
What does the Cell Membrane consist of?
A:
Cholesterol, Phospholipids/Sphingolipids, Carbohydrates, and Protein.
Q:
What is the Phospholipid Bilayer?
A:
A two-layered arrangement of phosphate and lipid molecules that form a cell membrane.

The hydrophobic lipid ends facing inward
The hydrophilic phosphate ends facing outward





Q:
What is the Membrane Protein?
A:
Protein molecule that is attached to or associated with the membrane or the organelle
Mehr Karteikarten anzeigen
Q:
What is Passive Transport?
A:
Transport is movement of molecules through the membranes which NO energy is required.
  • Moves high to low
Q:
What is the Channel Proteins?
A:
Channel Protein spans the membrane and make hydrophilic tunnels across it, allowing their target molecules to pass it by diffusion.

  • Gated channels - open or close in response to stimulus (chemical or electrical)

Three conditions to determine direction:
  • Relative concentration on either side of the membrane
  • Voltage difference across the membrane
  • Gated channels - if the channel is open or closed.
Q:
What is Osmosis?
A:
Spontaneous net movement or diffusion of solvent molecules through a selectively permeable membrane from a region of high water potential to a region of low water potential, in the direction that tends to equalize the solute concentrations on the two sides.
Q:
What is Osmotic concentration?
A:
Occurs when two solutions have different osmotic concentrations.
Q:
What is Osmotic Pressure?
A:
The pressure that must be applied to the solution side to stop fluid movement when a semipermeable membrane separates a solution from pure water
Q:
How does the Membrane maintain Osmotic Balance?
A:
Diffusion of water or solutes

Q:
What is arranged in the bilayer?
A:
Phospholipids
Membranes (Biology)

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