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Date Submitted: 08/28/2016 02:43 PM
Module 04 Case Study: Bone Tissue
Part I— “Marissa” Questions
1. Describe bone tissue and the role each component plays in bone physiology and remodeling. What is the difference between compact and spongy bone?
Basically bone remodeling is the breaking down of old bone and building it back up, this happens at the same time so the bone does not become weak.
One of the main differences between compact and spongy bone is compact bone is the hard material on the surface while the spongy part is in the inside and is filled with holes.
Reference: Learned this from listening to the videos posted on classes wall.
2. Explain the relationship between calcium and bones.
Calcium is needed to help make bones strong but our bodies needs vitamin d as well to be able to use the calcium we may be eating or drinking. Calcium is needed throughout life to not only help grow strong bones but to also maintain that strength throughout our lifetime.
Reference: Self-knowledge
3. Explain how the body controls calcium levels in the bones and blood. Be sure to describe the roles of parathyroid hormone (PTH) and calcitonin in detail.
One of the sole purposes of the parathyroid gland is to help regulate calcium levels in our body. The parathyroid does this by making a hormone called parathyroid hormone which tells the cells of the bones to release calcium into the blood stream. In normal circumstances this release is very well maintained but if there is too much parathyroid hormone to much calcium will be released into the blood stream which takes away from the calcium levels of the bones and making them weaker.
Reference: http://www.parathyroid.com/parathyroid-function.htm
4. Explain specifically how osteoporosis affects the bone matrix and the normal bone remodeling cycle. (1 point)
Osteoclasts are breaking down bone faster than osteoblasts can build it up which can result in bone porosity, this can increase chances of fracture....