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Related Concept Videos

Minerals01:26

Minerals

Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Roles of Electrolytes: Calcium and Phosphate01:27

Roles of Electrolytes: Calcium and Phosphate

Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily regulated...
Introduction to Electrolytes01:33

Introduction to Electrolytes

In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

Pharmacokinetics in Pediatric Patients: Drug Metabolism

In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses a challenge in...
Overview of Metabolism01:40

Overview of Metabolism

Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...

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Related Experiment Video

Updated: May 31, 2026

Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
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Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants

Published on: March 29, 2018

Fluoride metabolism.

Marília Afonso Rabelo Buzalaf, Gary Milton Whitford

    Monographs in Oral Science
    |June 25, 2011
    PubMed
    Summary

    Understanding fluoride metabolism is key to managing its biological effects and toxicity. Fluoride absorption and excretion are pH-dependent, influencing how the body processes this essential ion.

    Area of Science:

    • Biochemistry
    • Human Physiology
    • Toxicology

    Background:

    • Fluoride metabolism knowledge is crucial for understanding biological effects and preventing fluoride toxicity.
    • Fluoride's unique properties, particularly its pH-dependent membrane permeability, significantly influence its biological fate.

    Purpose of the Study:

    • To review the multifaceted aspects of fluoride metabolism in humans.
    • To elucidate the pH-dependent mechanisms governing fluoride absorption, distribution, and excretion.
    • To identify factors influencing fluoride's metabolic and toxicological profile.

    Main Methods:

    • Review of existing literature on fluoride absorption, distribution, and excretion.
    • Analysis of the pH-dependent properties of hydrogen fluoride (HF) and fluoride ions (F(-)).

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    Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products

    Published on: August 22, 2017

    Autofluorescence Imaging to Evaluate Cellular Metabolism
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    Autofluorescence Imaging to Evaluate Cellular Metabolism

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    Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants
    08:12

    Micro-dissection of Enamel Organ from Mandibular Incisor of Rats Exposed to Environmental Toxicants

    Published on: March 29, 2018

    Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products
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    Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products

    Published on: August 22, 2017

    Autofluorescence Imaging to Evaluate Cellular Metabolism
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    Autofluorescence Imaging to Evaluate Cellular Metabolism

    Published on: November 15, 2021

  • Discussion of factors affecting fluoride metabolism and biological effects.

    • Main Results:

    • Gastric fluoride absorption is rapid and pH-dependent due to HF's high membrane permeability.
    • Small intestine absorption is not pH-dependent; unabsorbed fluoride is excreted in feces.
    • Plasma fluoride levels peak within 20-60 minutes, declining due to tissue uptake and renal excretion.
    • Fluoride levels are not homeostatically regulated and are influenced by intake, deposition, and excretion.

    Conclusions:

    • Fluoride's pH-dependent gastric absorption is a distinguishing metabolic characteristic.
    • Numerous factors, including acid-base balance and nutritional status, can modify fluoride metabolism and its effects.
    • A comprehensive understanding of fluoride metabolism is vital for clinical and public health applications.