Role of the Cell Membrane, The

Synopsis: Shows pseudopodial formation by an amoeba and the way such structures may take in solid materials phagocytically. This is followed by the action of contractile vacuoles in ridding protozoa of excess water, taken in osmotically. Considers the reactions of cells to salt in the surrounding medium, beginning with pinocytosis in an amoeba and proceeding to diffusion and active transport of sodium ions across membranes. Shows the difference in the way such ions pass through dead and live cells of frog skin in an experiment using radioactive isotopes of sodium chloride. Shows comparable experiments upon large algal cells and suggests an explanation of the mechanism of active transport.
Series: Living Cell, Series
Language: English
Country: Denmark
Medium: Video; Videocassette. VHS. sd. col. 18 min.
Year of production: 1969
Availability: Hire
Sale
Uses: Introductory courses.*
Subjects: Biology
Keywords: cell membranes

Contributor

J Ryder; Richard Ashworth

Cast

Douglas Smith

Name: Council of Europe, Department for Relations with the Press and the Public

Name: Educational Foundation for Visual Aids
Notes: 2006 - titles now possibly in the Elsbury Images archive collection (0117 965 5952, e-mail: david@elsbury61.freeserve.co.uk)

Name: National Education Video Library
Contact: John Lovell
Email: tryfannevl@aol.com
Phone: 01286 676001 or 07768 105467
Fax: 01286 676001
Address: Arfon House
Bontnewydd
Caernarvon
Gwynned
LL54 7UN
Notes: Formerly the National Audio Visual (Aids) Library. No longer holds 16mm material. Retains the negatives and copyright to the EFVA material, but have no viewing copies. Video only. (1/97) Alternative address might be Arfon House, Bontnewydd, Caernarvon, Gwynned LL54 7UN Telephone/Fax 01286 676001

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British Universities Film & Video Council