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.
14 July 1992. Richard Presley (USA) spent 69 days 19 min in a module underwater at a lagoon in Key Largo, Florida, USA from 6 May to 14 July 1992. The test was carried out as part of a mission entitled Project Atlantis which had as its aim to explore the human factors of living in an undersea environment.