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Related Concept Videos

Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

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.
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
What is the Skeletal System?01:02

What is the Skeletal System?

Overview
Bone Remodeling01:40

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
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...
Synthesis and Functions of Calcitonin00:51

Synthesis and Functions of Calcitonin

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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Related Experiment Video

Updated: Jun 1, 2026

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
11:30

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro

Published on: June 2, 2022

Calcium and bone disease.

Harry C Blair1, Lisa J Robinson, Christopher L-H Huang

  • 1Department of Pathology, University of Pittsburgh, Veterans Affairs Health System, PA, USA. hcblair@imap.pitt.edu

Biofactors (Oxford, England)
|June 16, 2011
PubMed
Summary
This summary is machine-generated.

Bone cells rely on calcium transport and signaling for homeostasis. Genetic defects reveal how calcium transport impacts bone mass and cellular activity in bone formation and resorption.

Related Experiment Videos

Last Updated: Jun 1, 2026

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro
11:30

A Semi-Automated and Reproducible Biological-Based Method to Quantify Calcium Deposition In Vitro

Published on: June 2, 2022

Area of Science:

  • Bone Biology
  • Cellular Physiology
  • Mineral Metabolism

Background:

  • Bone is the primary calcium reservoir and regulator of calcium homeostasis.
  • Bone cells respond to parathyroid and vitamin D signals, and directly to extracellular calcium.
  • Genetic defects affecting calcium transport have illuminated roles in bone mass regulation.

Purpose of the Study:

  • To review the fundamental importance of calcium transport and signaling in bone cells.
  • To explore the mechanisms of calcium deposition by osteoblasts and mobilization by osteoclasts.
  • To highlight the role of calcium signaling in regulating bone cell differentiation and activity.

Main Methods:

  • Analysis of genetic defects associated with altered bone mass.
  • Examination of calcium and phosphate transport mechanisms in osteoblasts.
  • Investigation of acid secretion in osteoclast-mediated calcium mobilization.
  • Review of calcium-regulated signaling pathways in osteoclasts.

Main Results:

  • Osteoblasts utilize calcium and phosphate transport for bone deposition, coupled with alkalinization.
  • Osteoclasts mobilize calcium through acid secretion.
  • Calcium signaling is crucial for regulating the differentiation and activity of both osteoblasts and osteoclasts.
  • Specific focus on calcium's role in osteoclast differentiation and motility.

Conclusions:

  • Calcium transport and signaling are indispensable for bone cell function and overall calcium homeostasis.
  • Understanding these processes, particularly through genetic studies, provides insights into bone diseases.
  • Calcium acts as a critical regulator for bone formation, resorption, and cellular development.