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Related Concept Videos

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Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
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Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
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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.
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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.
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Titration of Polyprotic Base with a Strong Acid01:18

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The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
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Related Experiment Video

Updated: Feb 24, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
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Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis

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Bicarbonate Transport During Enamel Maturation.

Kaifeng Yin1,2, Michael L Paine3

  • 1Center for Craniofacial Molecular Biology, Herman Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA103, Los Angeles, CA, 90033, USA.

Calcified Tissue International
|August 11, 2017
PubMed
Summary

Tooth enamel formation involves pH regulation during maturation. Key proteins like carbonic anhydrases and bicarbonate transporters control acid-base balance, crucial for proper enamel development.

Keywords:
AmelogenesisBicarbonateCarbonic anhydraseEnamelSolute carrier genes

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Area of Science:

  • Biomineralization
  • Developmental Biology
  • Biochemistry

Background:

  • Amelogenesis, or tooth enamel formation, is a complex biomineralization process with distinct secretory and maturation stages.
  • During the secretory stage, ameloblasts secrete enamel matrix proteins (EMPs) in a neutral pH environment.
  • The maturation stage involves EMP degradation and significant mineral deposition, leading to pH fluctuations.

Purpose of the Study:

  • To review the roles of carbonic anhydrases and carbonate transporters in regulating pH during enamel maturation.
  • To highlight proteins instrumental in maintaining extracellular acid-base balance in amelogenesis.
  • To discuss the influence of miRNA regulation on bicarbonate transport in tooth enamel formation.

Main Methods:

  • Literature review focusing on proteins involved in pH regulation during amelogenesis.
  • Analysis of the mechanisms of bicarbonate transport and its regulation.
  • Examination of the interplay between pH, mineral deposition, and protein processing.

Main Results:

  • Identified key proteins including CA2, CA6, CFTR, AE2, NBCe1, and various SLC26 family members (SLC26A1/SAT1, SLC26A3/DRA, SLC26A4/PDS, SLC26A6/PAT1, SLC26A7/SUT2) as critical for pH control.
  • Demonstrated ameloblast-mediated regulatory networks involving bicarbonate ion movement are essential for extracellular acid-base balance.
  • Highlighted the association between miRNA regulation and bicarbonate transport in tooth enamel formation.

Conclusions:

  • Extracellular acid-base balance during enamel maturation is tightly regulated by ameloblast-mediated networks.
  • Carbonic anhydrases and bicarbonate transporters play vital roles in managing pH fluctuations during tooth enamel development.
  • Understanding these regulatory mechanisms is crucial for insights into enamel biomineralization and potential therapeutic targets.