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Related Concept Videos

Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Bone Disorders01:29

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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...
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Bone Remodeling01:40

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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.
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What is the Skeletal System?01:02

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Role of Vitamins in Maintaining Bone Health01:25

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
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Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
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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.
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...
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Related Experiment Video

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Update on Osteoporosis.

Tommaso Greco1,2, Carlo Perisano1

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Osteoporosis is a significant health issue affecting bone density, particularly in older adults. Research aims to improve understanding and management of this widespread condition.

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Area of Science:

  • Bone biology and aging research
  • Public health and epidemiology of bone diseases

Background:

  • Osteoporosis significantly impacts quality of life, especially in the elderly.
  • Reduced bone density is a key characteristic of osteoporosis.
  • It is a major public health concern globally.

Discussion:

  • Further research is needed to understand the multifaceted nature of osteoporosis.
  • Exploring the link between aging and reduced bone density is crucial.
  • Investigating conditions associated with decreased bone density is important.

Key Insights:

  • Osteoporosis affects bone density and quality of life.
  • The elderly population is particularly vulnerable to osteoporosis.
  • Understanding associated conditions is key to managing osteoporosis.

Outlook:

  • Future research directions in osteoporosis management.
  • Potential for improved public health strategies for bone health.
  • Advancements in understanding bone density reduction.