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Related Concept Videos

Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

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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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Synthesis and Functions of Calcitonin00:51

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Calcitonin, a vital polypeptide hormone, regulates calcium levels within body fluids. It is released by the parafollicular cells, also known as C cells, situated in the follicular epithelium of the thyroid gland. Calcitonin responds to fluctuations in blood calcium levels and the influence of gastrointestinal hormones like gastrin and cholecystokinin.
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...
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Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

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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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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...
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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.
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
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Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

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Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
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Related Experiment Video

Updated: Sep 13, 2025

Measurement of Total Calcium in Neurons by Electron Probe X-ray Microanalysis
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Measurement of Total Calcium in Neurons by Electron Probe X-ray Microanalysis

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Calcium Unified: Understanding How Calcium's Atomic Properties Impact Human Health.

Karen B Kirkness1, John Sharkey2, Suzanne Scarlata3

  • 1Health Professions Education Unit, Hull York Medical School, York YO10 5DD, UK.

Cells
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PubMed
Summary
This summary is machine-generated.

Calcium

Keywords:
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Area of Science:

  • Biochemistry
  • Cell Biology
  • Physiology

Background:

  • Calcium is vital for cellular functions and human health.
  • Its regulatory role is crucial across biological systems.
  • Calcium's unique molecular coordination geometry is key to its function.

Purpose of the Study:

  • To review calcium's role in cellular functions.
  • To integrate calcium's complex formation with its signaling role.
  • To explain calcium's biological importance through its variable coordination geometry.

Main Methods:

  • Literature review integrating calcium's complexation and signaling roles.
  • Examination of calcium-mediated proteins, including EF-hand domains.
  • Analysis of calcium's role in extracellular matrix assembly and tissue organization.

Main Results:

  • Calcium's ability to vary coordination structures, unlike magnesium, underpins its biological significance.
  • Calcium acts as a critical signaling atom.
  • Calcium is essential for protein complex formation and stabilization.

Conclusions:

  • Calcium's flexible coordination geometry is central to its diverse biological functions.
  • It serves as both a signaling molecule and a regulator of physiological homeostasis.
  • Understanding calcium's geometry is crucial for comprehending its role in health and disease.