Cell Membrane Function. The cell membrane (plasma membrane) is a thin semi-permeable membrane that surrounds the cytoplasm of a cell. Its function is to protect the integrity of the interior of the cell by allowing certain substances into the cell, while keeping other substances out.
25 years old, 2 December 1886 to Theodore Roosevelt, rancher and author, (27 October 1858, New York, New York, died 6 January 1919, Oyster Bay, New York) at St. Georgeâs Anglican Church, Hanover Square, London, England.
Franklin D. Roosevelt died in Warm Springs, GA on April 12 1945.