Anatomy and Cell Biology 3309 Study Guide - Final Guide: Tight Junction, Adherens Junction, Stratified Squamous Epithelium

100 views10 pages

Document Summary

Desmosomes (macula adherens) hold cells together at individual spots: here, there is a 30 nm space between the two cells that is electron dense. This is due to the cadherins proteins (desmoglein and desmocollin: again, there are electron-dense plaques on the cytoplasmic sides of both cells. Inserting into these plaques are 10 nm filaments (i. e. intermediate filaments) The plaques contain desmoplakin, plakoglobin, and plakophilin. On the basal surface of cells, we can find hemidesmosomes: these hold basal epithelial cells onto the basal lamina, they contain the same materials in the cytoplasmic side of the cells. In cells, the complexes discussed above are grouped together as the junctional complex: therefore, this includes zonula occludens (tight junctions), zonula and fascia adherens, and macula adherens (desmosomes) Junctional complexes can be seen in light microscopes, where they are called terminal bars. Gap junctions are the 3rd type of cell-cell junction: they are involved in transmitting electrical signals and metabolites between cells.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers

Related Documents

Related Questions