Podcast
Questions and Answers
In a TEM image of a trilaminar membrane, what is the characteristic of the middle layer?
In a TEM image of a trilaminar membrane, what is the characteristic of the middle layer?
- Electron-lucent (correct)
- Composed of heavy metals
- Identical to the outer layers
- Highly electron-dense
How many electron-dense layers are observed in a typical trilaminar membrane?
How many electron-dense layers are observed in a typical trilaminar membrane?
- Three
- Two (correct)
- Variable, depending on the sample
- One
Which microscopy technique is primarily used to visualize the trilaminar membrane structure?
Which microscopy technique is primarily used to visualize the trilaminar membrane structure?
- Atomic Force Microscopy
- Scanning Electron Microscopy
- Transmission Electron Microscopy (correct)
- Light Microscopy
Flashcards
Transmission Electron Microscopy (TEM)
Transmission Electron Microscopy (TEM)
A type of microscopy that uses electrons to create images of a sample.
Cell Membrane
Cell Membrane
The thin, outer layer of a cell, separating the inside from the outside.
Trilaminar Membrane
Trilaminar Membrane
A membrane's appearance under Transmission Electron Microscopy (TEM), revealing three distinct layers.
Electron-Dense Layers
Electron-Dense Layers
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Electron-Lucent Layer
Electron-Lucent Layer
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Study Notes
Transmission Electron Microscopy (TEM) Observations
- TEM images show the cell membrane as a trilaminar structure.
- This structure appears as two electron-dense layers separated by a central electron-lucent layer.
- The electron-dense layers represent the protein and lipid components of the membrane's exterior and interior surfaces.
- The electron-lucent layer corresponds to the hydrophobic lipid bilayer core.
- The trilaminar appearance is a classic TEM observation of biological membranes.
- The appearance is indicative of the basic membrane structure.
- The trilaminar pattern provides visual confirmation of the presence of the lipid bilayer arrangement of the cell membrane.
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