It is an element found in countless products, including steel, batteries, aluminum, animal feed, and welding metals. ... Once inside these cells, the heavy metal provokes a series of biochemical and molecular events leading to cell death induced by apoptosis and/or necrosis (Roth & Garrick 2003). ... An additional study was conducted by a Japanese neurologist who found a form of L-dopa responsive "juvenile parkinsonism" (Yokochi, Narabayashi, Izuka, & Nagatsu 1984). ... The specific mechanism of cell death is still under research. ... Necrosis is the disruption and disposal of a cell and i...

• Word Count: 4190
• Approx Pages: 17
• Has Bibliography
• Grade Level: Undergraduate

Osseous tissue contains specialized cells, cell products, and a fluid matrix. ... These lacunae are found between narrow sheets of calcified matrix, known as lamellae. ... The composition of bone consists of cells including osteoblasts, osteocytes, and osteoclasts, bone lining cells, the extracellular matrix, and the periosteum and endosteum. Osteoblasts are derived from osteoprogenitor cells, which are like stem cells for the bone, which are mesenchymal in origin. ... Compared with osteoblasts, osteocytes are smaller and have fewer numbers of organelles, although they do have a significant nu...

• Word Count: 5684
• Approx Pages: 23
• Has Bibliography
• Grade Level: Undergraduate