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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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Phosphate Buffer01:22

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The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
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Introduction to Electrolytes01:33

Introduction to Electrolytes

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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.
Role of Sodium
One...
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Roles of Electrolytes: Calcium and Phosphate01:27

Roles of Electrolytes: Calcium and Phosphate

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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...
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Protein Kinases and Phosphatases02:54

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Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
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Phosphoinositides and PIPs01:42

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Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
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Updated: Mar 10, 2026

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

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A Quick Reference on Phosphorus.

Ashley E Allen-Durrance1

  • 1Small Animal Clinical Sciences, University of Florida, 2015 Southwest 16th Avenue, Gainesville, FL 32608, USA.

The Veterinary Clinics of North America. Small Animal Practice
|December 19, 2016
PubMed
Summary
This summary is machine-generated.

Phosphate, a vital intracellular anion, plays a key role in biological processes. Its levels are tightly regulated by hormones, with imbalances leading to hypophosphatemia or hyperphosphatemia.

Keywords:
AnionHyperphosphatemiaHypophosphatemiaPhosphatePhosphorus

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Area of Science:

  • Biochemistry
  • Physiology
  • Endocrinology

Background:

  • Phosphate is the body's primary intracellular anion, crucial for numerous biological functions.
  • Phosphate distribution occurs intracellularly, within soft tissues, and in the extracellular space.
  • Phosphate homeostasis is maintained by hormonal regulation involving parathyroid hormone, calcitriol, calcitonin, and phosphatonins.

Purpose of the Study:

  • To summarize the role of phosphate in biological processes.
  • To outline the regulatory mechanisms of phosphate homeostasis.
  • To describe the causes of hypophosphatemia and hyperphosphatemia.

Main Methods:

  • Literature review of phosphate metabolism and regulation.
  • Analysis of hormonal influences on phosphate balance.
  • Categorization of factors contributing to phosphate imbalances.

Main Results:

  • Phosphate is essential for intracellular functions and tissue integrity.
  • Hormonal pathways (PTH, calcitriol, calcitonin, phosphatonins) modulate phosphate absorption and excretion.
  • Hypophosphatemia stems from reduced absorption, transcellular shifts, or increased renal excretion.
  • Hyperphosphatemia arises from diminished renal excretion, increased intake, or transcellular shifts.

Conclusions:

  • Phosphate is a critical electrolyte with complex regulatory mechanisms.
  • Disruptions in phosphate homeostasis can lead to significant clinical conditions.
  • Understanding these mechanisms is vital for managing phosphate-related disorders.