cell membrane. The thin membrane that forms the outer surface of the protoplasm of a cell and regulates the passage of materials in and out of the cell. It is made up of proteins and lipids and often contains molecular receptors. The membranes of organelles within the cell are made of the same basic material as the cell membrane. In plant cells, the cell membrane is surrounded by a rigid cell wall. Also called plasma membrane. Compare cell wall. See more at cell.
DNA tests have confirmed that a homeless man found dead beneath an overpass in San Diego was Elvis Presley. This claim is a hoax. âEarlier this month, an 80-year-old, homeless, white-bearded man was found deceased under an overpass in San Diego, California.
Each block was meticulously numbered before the bridge was disassembled. The blocks were then shipped overseas through the Panama Canal to California and trucked from Long Beach to Arizona. Following reconstruction of the London Bridge, Lake Havasu City rededicated it in a ceremony on October 10, 1971. The London Bridge, Arizona tourismâs second-largest attraction after the Grand Canyon, attracts thousands of visitors each year and is a popular stroll for people on romantic getaways in Arizona.