In this lesson you will look at how bone remodeling helps to maintain homeostasis by examining:
Bone Remodeling is the process bones constantly undergo of taking away and building tissue; is controlled by mechanical stress and hormonal negative feedback loops. Negative feedback is when there is a change that is sensed by the body, and that change is then reversed. Certain levels of calcium in the blood are needed for your nervous and muscle systems to be able to function properly. Bone remodeling is basically the process of recycling calcium to maintain proper levels in your blood.
Two types of cells in your bones play an important role in this process:
The process of bone remodeling is signaled by hormones; either the hormone PTH or Calcitonin. Depending on whether there's too much or too little calcium in the blood, one of those hormones is going to have a role in helping to maintain homeostasis. Homeostasis is the process of maintaining a stable internal environment.
Take a look at the diagram to summarize this process
Bone remodeling is the process the body goes through to maintain proper levels of calcium in your blood. If calcium levels change in the blood, the role of hormones is to signal the body to maintain homeostasis. If blood calcium is too low, PTH activates osteoclasts to release calcium from the bones. If blood calcium is to high, calcitonin activates osteoblast cells to build bone tissue. The body does this to achieve homeostasis.
Keep up the learning and have a great day!
Source: THIS WORK IS ADAPTED FROM SOPHIA AUTHOR AMANDA SODERLIND
The process bones constantly undergo of taking away and building tissue; is controlled by mechanical stress and hormonal negative feedback loops.
A hormone that is secreted by the thyroid gland that lowers osteoclast activity in proportion to osteoblast activity.
The process of maintaining a stable internal environment.
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.
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.
A hormone that is secreted by the parathyroid glands that activates osteoclasts when our blood calcium levels are too low.