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.
1 When the terminal button connects to a muscle cell, the connection is termed a neuromuscular junction. 2  The base of the terminal button connects to a portion of the membrane of the receiving cell via tiny fibers, leaving a small, fluid-filled gap between the two membranes.