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Skeleton and Calcium Homeostasis01:21

Skeleton and Calcium Homeostasis

4.9K
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.
4.9K
Hormones and Bone Tissue01:17

Hormones and Bone Tissue

3.0K
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...
3.0K
Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

3.5K
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...
3.5K
Qualitative Analysis03:46

Qualitative Analysis

22.7K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
22.7K
Sulfate Attack on Concrete01:29

Sulfate Attack on Concrete

330
Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
Sulfates from sources like soil, groundwater, or industrial effluents...
330
Synthesis and Functions of Calcitonin00:51

Synthesis and Functions of Calcitonin

2.6K
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...
2.6K

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Related Experiment Video

Updated: Sep 27, 2025

Calcium Imaging of Cortical Neurons using Fura-2 AM
12:15

Calcium Imaging of Cortical Neurons using Fura-2 AM

Published on: January 19, 2009

62.2K

Calcium burns beige.

Jakub Bunk1, Lawrence Kazak1,2

  • 1Department of Biochemistry, McGill University, Montreal, Quebec, Canada.

The Journal of Experimental Medicine
|April 12, 2022
PubMed
Summary

Loss of FNIP1 protein leads to the browning of white adipose tissue. This process is driven by reduced calcium uptake into the endoplasmic reticulum (ER), impacting energy metabolism.

Area of Science:

  • Cell Biology
  • Metabolism
  • Endocrinology

Background:

  • White adipose tissue (WAT) primarily stores energy.
  • Adipose tissue browning converts WAT to a more energy-dissipating form.
  • The molecular mechanisms regulating adipose tissue browning are not fully understood.

Purpose of the Study:

  • To investigate the role of FNIP1 in regulating adipose tissue phenotype.
  • To elucidate the mechanisms by which FNIP1 influences white adipose tissue browning.

Main Methods:

  • Utilized genetic manipulation to study FNIP1 function in adipocytes.
  • Assessed changes in adipose tissue characteristics, including browning markers.
  • Investigated cellular processes related to calcium homeostasis and endoplasmic reticulum function.

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

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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

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Related Experiment Videos

Last Updated: Sep 27, 2025

Calcium Imaging of Cortical Neurons using Fura-2 AM
12:15

Calcium Imaging of Cortical Neurons using Fura-2 AM

Published on: January 19, 2009

62.2K
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

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Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels
07:17

Single-Cell Calcium Imaging for Studying the Activation of Calcium Ion Channels

Published on: December 13, 2024

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Main Results:

  • Loss of FNIP1 expression was associated with the browning of white adipose tissue.
  • FNIP1 deficiency led to decreased calcium uptake into the endoplasmic reticulum.
  • This ER calcium dysregulation was identified as a key driver of adipose tissue browning.

Conclusions:

  • FNIP1 plays a critical role in maintaining white adipose tissue identity.
  • Dysregulation of ER calcium uptake due to FNIP1 loss promotes WAT browning.
  • These findings offer new insights into metabolic regulation and potential therapeutic targets.