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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/unesp/360993
Title: 
Dancing ear cell
Author(s): 
Santos-Sacchi, Joseph
Language: 
eng
Description: 
  • The cochlea of a guinea pig ear contains thousands of hair cells that transduce mechanical forces into electrical impulses (which are interpreted by the brain as sound). Two populations of hair cells exist: The outer hair cells (one of which is featured in this sequence) and the inner hair cells. The original vibrations of, say, a violin, cause the tympanic membrane to move, setting up pressure waves in the auditory canal, which are, in turn, converted into pressure waves in the fluid-filled inner ear. The hair cells that line the cochlea are associated with sensory neurons at their basal ends, and have mechanosensitive stereocilia on their apical surfaces. When these stereocilia bend in response to pressure waves, the cell responds by opening and closing ion channels, leading to current and voltage changes. This modulation of the membrane potential leads to changes in transmitter release onto the sensory neurons, signaling the brain. What you are seeing in this video is the response of an outer hair cell to voltage changes in its membrane. This response is the 'dancing' we see on the screen. These electrical changes (created by playing music to the cell) are being artificially fed to the cell through the electrode, bypassing the normal mechanical stimulation of the stereocilia
  • Componente Curricular::Educação Superior::Ciências Biológicas::Biologia Geral
Issue Date: 
  • 12-May-2009
  • 12-May-2009
  • Nov-2007
  • 12-May-2009
  • 2-Oct-2008
Publisher: 
The American Society for Cell Biology, ASBC Image & Video Library
Keywords: 
  • Cell
  • Educação Superior::Ciências Biológicas::Biologia Geral
Notes: 
To show the response of an outer hair cell to voltage changes in its membrane
Credits: 
Duration: 1 min, 38 s. According to the site, The American Society for Cell Biology ASBC Image & Video Library, this video is the series [Cellebration; I. Cells make a body; 3]. To visualize this source its necessary the instalation of Quick time. Available at: <http://www.apple.com/pt/quicktime/>
Source: 
http://objetoseducacionais2.mec.gov.br/handle/mec/10251
URI: 
http://acervodigital.unesp.br/handle/unesp/360993
Rights: 
You may use the Images only for research and educational purposes in an educational institution. Images may be stored on a network server, hard drive or removable media, but only while this Agreement remains in effect. All of the Images you use must be accompanied by a notice stating, "© [Date and Author's or Owner's Name]. All rights reserved. Reprinted under license from The American Society for Cell Biology." The notice shall appear with the Images or on a credits page. "Educational purposes" means (i) non-commercial instruction or curriculum based teaching by educators to students at nonprofit educational institutions, (ii) planned non-commercial study, investigation or research directed toward making a contribution to a field of knowledge, or (iii) presentation of research findings at non-commercial peer conferences, workshops or seminars, but in any event there must be express written permission from ASCB before an Image can be published. "Educational institutions" include K-12 schools, colleges and universities. Libraries, museums, hospitals, research institutes and other nonprofit organizations are considered educational institutions when they engage in nonprofit instructional, research or scholarly activities for educational purposes
Type: 
vídeo
Appears in Collections:MEC - Objetos Educacionais (BIOE) - OE

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