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.
33rd Governor. 1899â1900. A life-long public servant, Theodore Roosevelt (1858â1919) served as a State Assembly Member, United States Civil Service Commissioner, president of the New York Board of Police Commissioners, and Assistant Secretary of the Navy.