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The risk of having osteoporosis includes age and sex. Risk factors include both nonmodifiable (for example, age and some medications that may be necessary to treat a different condition) and modifiable (for example, alcohol use, smoking, vitamin deficiency). In addition, osteoporosis is a recognized complication of specific diseases and disorders.
Osteoporosis occurs when there is an imbalance between the bone resorption activities of osteoclasts and the bone formation activities of osteoblasts. [23] Osteoclast activity is also mediated by the interaction of two molecules produced by osteoblasts, namely osteoprotegerin and RANK ligand. These molecules also regulate differentiation of the ...
The cell body varies in size from 5–20 micrometers in diameter and contain 40–60 cell processes per cell, [4] with a cell to cell distance between 20–30 micrometers. [3] A mature osteocyte contains a single nucleus that is located toward the vascular side and has one or two nucleoli and a membrane. [ 5 ]
Osteoporosis is defined by the National Institutes of Health as ‘‘a skeletal disorder characterized by compromised bone strength predisposing a person to an increased risk of fracture.’’ [19] Low estrogen levels and poor nutrition, especially low calcium intake, can lead to osteoporosis, the third aspect of the triad.
The different stages of mitosis altogether define the mitotic phase (M phase) of a cell cycle—the division of the mother cell into two daughter cells genetically identical to each other. [3] The process of mitosis is divided into stages corresponding to the completion of one set of activities and the start of the next.
The playoffs are here for millions of fantasy football managers. Here are our recommendations to start or sit in your lineup this week.
The second College Football Playoff seminal features a Big Ten vs. SEC matchup between Ohio State and Texas. A look at how the teams match up.
Sweet meets savory in Trader Joe's seasonal peppermint-crunch popcorn, which mixes dark- and white-chocolate-coated kernels tossed in crushed candy canes.