Explore
Post homework questions online and get free homework help from tutors.
Learn More
Improve Grades
Help Others
Save Time
Accessible 24/7
There are currently 211 guests browsing and 3 members online. So far today, 273 students have registered.
Related Images
2474
5
04/29/12

274
0
01/20/15

20
0
02/27/17
Poll
Which coffee house do you prefer the most?
Starbucks
Tim Hortons
Dunkin' Donuts
McDonald's
Seattle’s Best
Other
If you would like to vote in this poll, please login or register

Previous poll results: Which is the WORST study habit?
New Topic  
Morbesety
wrote...
6 years ago
What are intercellular junctions and why are they important? also

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

thanks!~
Read 13520 times
1 Reply
replies
wrote...
Administrator
6 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.
✓ Don't be mean, we need followers on Twitter too! Slight Smile
New Topic      
Similar topics that might interest you...
Cell Biology   4 years ago   colleen   bio_man   1 Reply   1750 Views
General Biology   4 years ago   txstar01   doubleu   1 Reply   452 Views
Cell Biology   3 years ago   cmeister703   padre   4 Replies   1201 Views
Zoology and Botany   3 years ago   dbassan   tryingtopass   1 Reply   190 Views
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.