Answers. Relevance. Rating Newest Oldest. Best Answer: a Spanish term that was formerly used in the Spanish Empire to designate people of mixed European (Spaniard) and Amerindian ancestry living in the region of Latin America.[1] The word originated from the Romance language / Latin word Mixticius, meaning mixed.
For centuries, lead toxicity has been one of the most significant preventable causes of neurologic morbidity from an environmental toxin. A heavy metal, lead is ubiquitous in our environment but has no physiologic role in biological systems.
Lead toxicity can cause symptoms that mimic acute porphyria (acute abdominal pain, constipation, and neuropathy). Lead inhibits several of the enzymes of haem biosynthesis, which can therefore result in an increase in urine coproporphyrin and 5-aminolevulinic acid excretion, but not porphobilinogen excretion.