Learning on ScreenBiology 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
- 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
Record Stats
This record has been viewed 513 times.
