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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 pigmen
    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 all-trans-retinal
    4. All of the answers are true
    5. None of the answers are true
    1. Vitamin A does not play any role in the human vision
    2. Vitamin A is very crucial for light detection by the human eye
    3. Vitamin A plays an important role in the gene expression and cell differentiation during developmental phase
    4. Vitamin A is a fat-soluble vitamin and an excess of this vitamin can lead to toxicity
    5. β-carotene acts as a precursor for vitamin A synthesis

    Author of lecture Vitamin A: Introduction

     Kevin Ahern, PhD

    Kevin Ahern, PhD


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    it is really so good l like it so much
    By nabaa m. on 11. September 2017 for Vitamin A: Introduction

    It is really so good thing to take more information and I like so much the way of the explain for the teacher thank you so much for this helping for students