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Related Concept Videos

Connective Tissue Cell Types01:22

Connective Tissue Cell Types

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Connective tissue develops from the mesoderm of a developing embryo and consists of cells, fibers, and ground substance: a gel-like material containing large complexes of carbohydrates and proteins. Connective tissue was first identified as a separate tissue family in the 18th century, and Johannes Peter Muller coined the term connective tissue.
Fat cells (adipocytes), smooth muscle cells (myoblasts), and bone cells (osteoblasts) are some connective tissue cell types. Some immune system cells...
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Role of Skin in Vitamin D Synthesis01:23

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The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin...
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Role of Vitamins in Maintaining Bone Health01:25

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
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Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
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Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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Fatigue01:21

Fatigue

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Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
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Vitamins01:30

Vitamins

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Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced...
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Related Experiment Video

Updated: Apr 3, 2026

A Rapid and Specific Microplate Assay for the Determination of Intra- and Extracellular Ascorbate in Cultured Cells
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A Rapid and Specific Microplate Assay for the Determination of Intra- and Extracellular Ascorbate in Cultured Cells

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Daily vitamin C consumption and fatigability

E Cheraskin, W M Ringsdorf, F H Medford

    Journal of the American Geriatrics Society
    |March 1, 1976
    PubMed
    Summary

    Low vitamin C intake is linked to increased fatigue. This study found that individuals with lower vitamin C consumption reported double the fatigue symptoms compared to higher consumers.

    Area of Science:

    • Nutrition Science
    • Human Physiology
    • Public Health

    Background:

    • Fatigue is a common symptom with multifactorial causes.
    • Vitamin C (ascorbic acid) is an essential nutrient involved in energy metabolism.
    • Limited research explores the direct link between vitamin C intake and fatigue prevalence.

    Purpose of the Study:

    • To investigate the relationship between vitamin C intake levels and the prevalence of fatigue symptoms.
    • To quantify the association between low vitamin C consumption and increased fatigability.

    Main Methods:

    • Analysis of existing data from 411 dentists and their spouses.
    • Assessment of self-reported vitamin C intake (low vs. high users).
    • Comparison of the mean number of fatigue symptoms between the two vitamin C intake groups.

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    Last Updated: Apr 3, 2026

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    Main Results:

    • A statistically significant negative relationship was observed between vitamin C intake and fatigability.
    • Individuals with low vitamin C intake reported twice as many fatigue symptoms as high intake individuals.
    • The observed difference in fatigue symptoms between the groups was statistically significant.

    Conclusions:

    • Lower vitamin C intake is associated with a higher prevalence of fatigue symptoms.
    • Adequate vitamin C consumption may play a role in mitigating fatigue.
    • Further research is warranted to confirm these findings and explore underlying mechanisms.