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Homeostasis and Bone Remodeling

Homeostasis and Bone Remodeling

Description:

This lesson will define the role of bone remodeling in maintaining homeostasis in the body.

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Tutorial
Terms to Know
Bone remodeling

The process bones constantly undergo of taking away and building tissue; is controlled by mechanical stress and hormonal negative feedback loops.

Calcitonin

A hormone that is secreted by the thyroid gland that lowers osteoclast activity in proportion to osteoblast activity.

Homeostasis

The process of maintaining a stable internal environment.

Osteoblast

A cell found in bones that builds bone tissue by secreting collagen into bone tissue spaces; the collagen binds to calcium and forms the tough tissue within bones.

Osteoclast

A cell found in bones that secretes hydrochloric acid that breaks down bone the bonds between calcium and collagen; the calcium is released from bone.

Parathyroid hormone (PTH)

A hormone that is secreted by the parathyroid glands that activates osteoclasts when our blood calcium levels are too low.