Discuss the effects of lead exposure on health and human performance
What will be an ideal response?
Chemically similar to nutrient minerals such as iron, calcium, and zinc (cations with two positive charges), lead displaces them from some of the metabolic sites they normally occupy so they are then unable to perform their roles. For example, lead competes with iron in heme, but it cannot carry oxygen. Similarly, lead competes with calcium in the brain, but it cannot signal messages from nerve cells. Excess lead in the blood also deranges the structure of red blood cell membranes, making them leaky and fragile. Lead interacts with white blood cells, too, impairing their ability to fight infection, and it binds to antibodies, thwarting their effort to resist disease.
You might also like to view...
If a 70-kilogram athlete is exercising at an oxygen consumption level of 2.94 liters (2,940ml) per minute, what is the approximate MET level?
A. 14 B. 11 C. 12 D. 10 E. 8
Active transport requires energy for the Na-K pump to transport Na out of the cell, thereby driving the transport of another substance (e.g., glucose) when the Na re-enters the cell down its concentration gradient
Indicate whether the statement is true or false
The bill authorizing the WIC supplemental feeding program became Public Law 92-433 . The numbers 92-433 stand for ____
a. bill number 433, approved by a margin of 92 b. bill number 92, enacted by the 433rd Congress c. bill number 433, enacted by the 92nd Congress d. bill number 92, approved by 433 votes
Why do nutrition professionals sometimes change their recommendations for what people should do to optimize nutrition and health?