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Related Concept Videos

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...
The Parathyroid Glands00:59

The Parathyroid Glands

The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
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 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.
Roles of Electrolytes: Calcium and Phosphate01:27

Roles of Electrolytes: Calcium and Phosphate

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 regulated...
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: Jul 7, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
03:57

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

Published on: July 14, 2023

[Primary hyperparathyroidism: current role of bone densitometry].

M J Alcaraz1, R Lorente, Y Del Valle

  • 1Servicio de Radiodiagnóstico. Hospital Universitario Santa Cristina. Madrid. España. mariaalcaraz@mi.madritel.es

Radiologia
|February 16, 2008
PubMed
Summary

Bone densitometry is useful for monitoring primary hyperthyroidism (PHPT) patients. Osteoporosis is common, with surgical treatment leading to greater bone mass gains compared to medical management.

Related Experiment Videos

Last Updated: Jul 7, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
03:57

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy

Published on: July 14, 2023

Area of Science:

  • Endocrinology
  • Bone Metabolism
  • Nuclear Medicine

Background:

  • Primary hyperparathyroidism (PHPT) is characterized by elevated parathyroid hormone (PTH) levels.
  • Bone loss is a significant complication of PHPT, impacting bone mineral density.
  • Early diagnosis and monitoring are crucial for managing PHPT and its skeletal consequences.

Purpose of the Study:

  • To evaluate the utility of bone densitometry in diagnosing and tracking bone mass changes in patients with PHPT.
  • To compare the effects of surgical versus medical treatment on bone mineral density in PHPT patients.

Main Methods:

  • Retrospective analysis of 48 PHPT patients, divided into surgical (27) and medical (21) treatment groups.
  • Bone densitometry, biochemical markers (PTH, calcemia), and radiological findings were assessed at baseline and at one and two years post-treatment.

Main Results:

  • Osteopenia and osteoporosis were prevalent, affecting 70.3% and 81.3% of patients, respectively, primarily in the radius and spine.
  • Surgical treatment resulted in significant reductions in calcemia and PTH levels, alongside greater improvements in bone mass compared to medical treatment.
  • Fractures occurred in 21.8% of patients, highlighting the skeletal fragility associated with PHPT.

Conclusions:

  • Bone densitometry is an effective tool for assessing bone mass in PHPT patients before and after treatment.
  • Osteoporosis is a frequent comorbidity in PHPT, underscoring the need for bone health monitoring.
  • Surgical intervention appears more beneficial than medical management for improving bone mineral density in PHPT.