Absoprtion of lead poisioning

Absoprtion of lead poisioning - Learning Issue 3 Saturday,...

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Saturday, August 28, 2010 5:13 PM Learning Issue: How is lead absorbed Name: Michael Holmes Definition Lead exposure occurs through contaminated air and food and water. Most of the absorbed lead (80% to 85%) is incorporated into bone and developing teeth, where it competes with calcium; its half-life in bone is 20 to 30 years Pasted from < http://www.mdconsult.com/das/book/body/216613019- 4/1045253672/2060/78.html#4-u1.0-B978-1-4377-0792-2. .50014-6--cesec9_805 > Causes For most of the twentieth century the major sources of lead in the environment were lead-containing house paints and gasoline. Although limits have been set for the amounts of lead contained in residential paints, and leaded gasoline has practically disappeared in the United States, lead contamination remains an important health hazard, particularly for children. The large-scale recall of toys containing lead in 2007 alerted the general public to the dangers of lead exposures. There are many sources of lead in the environment, such as from mining, foundries, batteries, and spray painting, which constitute occupational hazards. However, flaking lead paint in older houses and soil contamination pose major hazards to youngsters, and ingestion of up to 200 mg/day can occur Pasted from < http://www.mdconsult.com/das/book/body/216613019- 4/1045253672/2060/78.html#4-u1.0-B978-1-4377-0792-2. .50014-6--cesec9_805 > Risk Factors Environmental, toys, and occupational hazards containing lead Pathophysiology The neurotoxic effects of lead are attributed to the inhibition of neurotransmitters caused by the disruption of calcium homeostasis Pasted from < http://www.mdconsult.com/das/book/body/216613019- 4/1045253672/2060/78.html#4-u1.0-B978-1-4377-0792-2. .50014-6--cesec9_805 > It can be very subtle, producing mild dysfunction, or it can
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This note was uploaded on 02/18/2012 for the course PAS 600 - 601 taught by Professor Garrubba during the Fall '10 term at Chatham University.

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Absoprtion of lead poisioning - Learning Issue 3 Saturday,...

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