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Vitamin A: Introduction

by Kevin Ahern, PhD
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    About the Lecture

    The lecture Vitamin A: Introduction by Kevin Ahern, PhD is from the course Vitamins. It contains the following chapters:

    • Vitamin D and Vitamin A
    • Vitamin A - Rods and Cones

    Included Quiz Questions

    1. It has three primary forms – retinol, retinal, and retinoic acid.
    2. It is one of the water-soluble vitamins.
    3. It is stored in the kidney.
    4. All of the answers are true.
    5. None of the answers are true.
    1. Double bonds play critical roles in light detection.
    2. Retinol is the light-sensing pigment
    3. Light detection occurs as a result of rotation of a single bond
    4. All of the answers are true.
    5. None of the answers are true.
    1. All of the answers are true.
    2. None of the answers are true.
    3. They contain photopigments.
    4. They include cones, which detect color and rods, which detect light.
    5. They contain opsin, which holds retinal.
    1. They become hyperpolarized when stimulated by light.
    2. They contain the protein opsin, which isomerizes in the light.
    3. They start out with all-trans-retinal.
    4. All of the answers are true.
    5. None of the answers are true.

    Author of lecture Vitamin A: Introduction

     Kevin Ahern, PhD

    Kevin Ahern, PhD


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