Biology of Heart Muscle, The

Synopsis

Contraction of cardiac muscle is performed by the sliding movement of the filaments of the myofibrils. The energy for this purpose is provided by the hydrolysis of ATP. The mitochondria replenish the supply of ATP by oxidative phorylation. The presence of the sodium : potassium exchange pump in the cell wall membrane, together with the varying permeability of the membrane to different ions leads to a resting transmembrane potential. During excitation the permeability of the membrane changes in a sequential fashion. The action of a number of cardio-active drugs may be explained in this region. The link between excitation and contraction is mediated by calcium ions which are alternately sequested and released by the sacroplasmic reticulum.

Series

Scientific Basis of Medicine, Series

Language

English

Country

Great Britain

Medium

Video; Videocassette. U-matic, VHS. b&w/col. 31 min.

Year of production

1977

Availability

Sale

Uses

Postgraduate audiences in medical and biological sciences.

Subjects

Medical sciences

Keywords

heart; muscles; physiology - human

Credits

Director

David R Clark

Producer

David R Clark

Writer

P Harris

Contributor

David R Clark

Cast

P Harris

Production Company

Name

University of London Audio-Visual Centre

Notes

Closed down.

Sponsor

Name

British Postgraduate Medical Federation

Phone

071-831 7599

Address

33 Millman Street
LONDON
WC1N 3EJ

Distributor

Name

Wellcome Film

Email

misc@wellcome.ac.uk

Web

http://wellcomelibrary.org/about-us/about-the-collections/moving-image-and-sound-collection/ External site opens in new window

Phone

020 7611 8766

Fax

020 7611 8577

Address

Moving Image & Sound Collections
Wellcome Library
183 Euston Road
London
NW1 2BE