Kinesiology 4474A/B Study Guide - Midterm Guide: Bed Rest, Asymptomatic, Bone Resorption
5 Apr 2016
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Document Summary
Physical activity and exercise guidelines for older adults: bone health review. The science that deals with the measurement of the size, weight, and proportions of the human body. Homeostasis and storage of calcium and other ions: phosphate, carbonate for acid-base regulation. Bones are living tissue and store various minerals. Trabecular (cancellous: spongy, irregular, metabolically active. Constantly renews entire skeleton replaced every 10 years. Delicate balance between resportion and formation: if resportion > formation then structure is weakened and density is reduced. Increased breakdown does occur with primary aging (due to hormone levels) Modeling: changes in bone shape, allows bone growth and improvements in strength, mainly in growing years. Bones genetically programmed, to become strong enough to function. Remodeling: calcium homeostasis, old/damaged bone replaced, balanced resorption and formation of bone, in aging skeleton, resorption dominates. Reduced mechanical force (muscles pull on bones) Gain and eventual loss of bone mass.
