Not to be confused with Retinal. Retinol, also known as Vitamin A1, is a vitamin found in food and used as a dietary supplement. As a supplement it is used to treat and prevent vitamin A deficiency, especially that which is resulting in xerophthalmia.
Desmosomes are anchoring junctions â mechanical couplings scattered like rivets along the sides of adjacent cells to prevent their separation. On the cytoplasmic face of each plasma membrane is a thickening called a plaque.
IX. 3 Types Of Cell Junctions Found In Animal Tissues A. tight junctions 1. neighboring cells held tightly together via proteins 2. prevent leakage B. desmosomes (anchoring junctions) 1. function like rivets to hold cells together in strong sheets 2. common in tissues subject to stretching or mechanical stress a. skin & muscle C. gap junctions 1. are communicating junctions 2. protein lined pores 3. allow small molecules to flow between adjacent cells a. ions of heart cells to coordinate contraction b. enable embryo cells to communicate â¢ A desmosome forms a very strong spot weld between cells. It is created by the linkage of cadherins and intermediate filaments. (credit: modification of work by Mariana Ruiz Villareal)