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.
A gap junction is like a ' tunnel ' in between cells where messages and nutrients can be passed back and forth. A tight junction is the connection between two cells that are sâ¦trongly ' sown ' together with protein threads to help maintain tissue arrangment.