Skip to main content
Taylor & Francis Group Logo
    Advanced Search

    Click here to search products using title name,author name and keywords.

    • Login
    • Hi, User  
      • Your Account
      • Logout
      Advanced Search

      Click here to search products using title name,author name and keywords.

      Breadcrumbs Section. Click here to navigate to respective pages.

      Chapter

      Photoreceptors
      loading

      Chapter

      Photoreceptors

      DOI link for Photoreceptors

      Photoreceptors book

      Photoreceptors

      DOI link for Photoreceptors

      Photoreceptors book

      ByAlan Longstaff
      BookBIOS Instant Notes in Neuroscience

      Click here to navigate to parent product.

      Edition 3rd Edition
      First Published 2011
      Imprint Taylor & Francis
      Pages 6
      eBook ISBN 9780429212840
      Share
      Share

      ABSTRACT

      Rod and cone photoreceptors have similar structures (Figure 1). Photoreceptors have diameters ranging from 1 to 4 μm, being smaller at the fovea, enhancing visual acuity there. The inner segment contains the nucleus and has an axon-like process connected to a synaptic terminal. The outer segment in the cone cell has its plasma membrane Photoreceptors: (a) a rod cell; (b) a cone cell. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429212840/ec7c9128-9b44-4171-97f1-ac3f1921b079/content/fig1_G3.tif" xmlns:xlink="http://www.w3.org/1999/xlink"/> 141 invaginated into numerous closely packed parallel folds, forming discs. In rod cells the discs are pinched off the plasma membrane to become completely intracellular. The disc membrane is densely packed with visual pigment. In rod cells this is rhodopsin. Each type of cone cells has its characteristic cone opsin. The outer segment is continually regenerated from the base, whilst its apical tip is phagocytosed by pigment epithelial cells at the rate of 3-4 discs per hour. Photoreceptors are incapable of mitotic division.

      T&F logoTaylor & Francis Group logo
      • Policies
        • Privacy Policy
        • Terms & Conditions
        • Cookie Policy
        • Privacy Policy
        • Terms & Conditions
        • Cookie Policy
      • Journals
        • Taylor & Francis Online
        • CogentOA
        • Taylor & Francis Online
        • CogentOA
      • Corporate
        • Taylor & Francis Group
        • Taylor & Francis Group
        • Taylor & Francis Group
        • Taylor & Francis Group
      • Help & Contact
        • Students/Researchers
        • Librarians/Institutions
        • Students/Researchers
        • Librarians/Institutions
      • Connect with us

      Connect with us

      Registered in England & Wales No. 3099067
      5 Howick Place | London | SW1P 1WG © 2022 Informa UK Limited