robin082006
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12. A fluorescent molecule of 2000 daltons is microinjected into a single cell of an epithelial layer. When the layer is examined in a fluorescence microscope, the molecule remains confined to that cell. However, when a fluorescent molecule of 800 daltons is injected into a single cell of an epithelial layer, it quickly appears in the adjacent cells. Which of the following is responsible for the spread of the smaller molecule?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
A) Desmosomes (maculae adherentes)
B) Focal contacts
C) Gap junctions
D) Intermediate junctions
E) Tight junctions (zonulae occludentes)
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| drpkaur
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Is it C..
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| reet
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yes C
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| robin082006
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Agree, thanks
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| robin082006
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I checked Kaplan note, Anatomy, pg18, answer must be C. Gap junction
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| Cedrick
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I can se clearly now the rain is gone
C
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| Diego Casali
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C
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| waqastariq
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yups I think the same.. 
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| mjl1717
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i found it difficult to get good info and pictures on this cell juncion topic
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