You need to login first

Login information

Haven't yet registered?

×

Categories

Homework Help Boards (University / College Level)

Biology-Related

Science-Related

Others

Laboratory Help


Non-Homework Help Boards

Notes

Guidance

Discussion

×
* * * *
Naya
3576
Skip91
2642
Merra
1914
Salty
1220
top posters

Support Us

If you found our community helpful, your small donation will help us reach more students around the globe. You may also like us on Facebook or follow us on Twitter.
Pages: 1     Go Down
  New Topic  |  more  
Morbesety
wrote...
4 years ago
What are intercellular junctions and why are they important? also

Contrast plasmodesmata, tight junctions, desmosomes, and gap junctions.

thanks!~
  • Read 8642 times
  • 1 Reply
replies
wrote...
*
Posts: 14426
Credits: 1476
Rep:  +1214  -5 
     
4 years ago
Hey,

A cell junction is a type of structure that exists within the tissue of a multicellular organism. They consist of protein complexes and provide contact between neighbouring cells, between a cell and the extracellular matrix, or they build up the paracellular barrier of epithelia and control the paracellular transport.

Plasmodesmata are microscopic channels which go across the cell walls of plant cells, enabling transport of water and minerals and communication between them. These junctions are found only in plants, not animals cells.

Tight junctions are the closely associated areas of two cells whose membranes join together forming a virtually impermeable barrier to fluid. It is a type of junctional complex present only in vertebrates.

Desmosomes are molecular complexes of cell adhesion proteins and linking proteins that attach the cell surface adhesion proteins to intracellular keratin cytoskeletal filaments.

A gap junction is a specialized intercellular connection between a multitude of animal cell-types. It directly connects the cytoplasm of two cells, which allows various molecules and ions to pass freely between cells. This is very similar to plasmodesmata that are found in plants.
Donate to keep this website running
✓ Like us on Facebook
✓ Follow us on Twitter
Pages: 1     Go Up New Topic more
Related Topics
Note: This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.

Ask a Question

ask
Click to ask a question. 213 Students and 2 members are standing by to answer all your science and biology homework problems, free. So far today, 92 guests have joined.
Related Images
Views
356
Rating

Views
440
Rating

Views
1075
Rating