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13 Cards in this Set
- Front
- Back
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What is cortical bone |
-compact bone -cortical bone is very dense and makes up 80% of the skeleton |
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What is the functions related to metabolic processes |
-bone tissue acts as a storage reservoir for many minerals -the body draws upon such deposits when these minerals are needed for various body processes -most red blood cells are produced in bone marrow |
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What is Peak bone density |
It is the point at which our bones are the strongest because they are at the highest density |
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Describe osteoclasts |
Cells that are Road surface of Bones by secreting enzymes and acids that dig grooves into the bone matrix |
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Describe osteoblasts |
cells that prompted the formation of new bone matrix by laying down collagen containing components of bone, which is then mineralized |
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What is going on in our 30s and 40s |
-by age 30 we reach Peak bone mass and cannot add to our bone density -by age 40 you start losing our bone mass |
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What does a t score of less than 2.5 mean |
A t score of -2.5 indicates osteoporosis |
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What occurs when you have low blood calcium |
-parathyroid hormone is released, which stimulates activation of vitamin D, causing kidneys to retain more calcium, osteoclasts break down bone and release calcium, stimulation of calcium absorption from intestines |
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Where's the parathyroid hormone |
In the parathyroid gland |
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What occurs when you have high blood calcium |
Thyroid gland releases calcitonin, which prevents calcium absorption from kidneys, limits calcium reabsorption from intestines, and inhibits osteoclasts from breaking down bone |
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Where is calcitonin released from |
Thyroid gland |
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What is bioavailability |
The degree to which our bodies can absorb and utilize any given nutrient |
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How much calcium can you absorb at one time |
500mg |
