Flashcards in Rock Minerals Deck (22):
What are the trace minerals?
What is the function of fluoride?
Mineralization of bone and teeth
Dental cavities prevention
What is the function of chromium?
Enhances insulin effects
What are dietary sources of zinc?
What does zinc play a role in?
How is Zinc taken up on the apical side of epithelial cells?
ZIP4 zinc transporter
How is zinc exported on basolateral side?
Zinc transporter ZnT
Where does intestinal absorption of zinc mostly happen?
What are symptoms of zinc deficiency?
Reduced taste sensitivity
How does zinc toxicity usually happen?
What are common symptoms of zinc excess?
CNS + GI effects, problems with copper absorption
How is iodine taken up into epithelial cells?
Sodium-iodide symporter = SLC5A5
What are symptoms of iodine deficiency?
Fetus: growth and mental retardation
What are symptoms of iodine toxicity?
Goiter (thyroid enlargement)
Metallic taste in mouth
What are rich dietary sources of selenium?
How is selenium taken up into cells?
Na-dependent transporter = inorganic Se in duodenum and cecum
Amino acid transporters = organic Se in small intestine
How is iodine transported in plasma?
How is selenium transported in plasma?
How is fluoride transported in plasma?
What do deficiencies in selenium cause?
Severe def. = Keshan disease
Moderate deficiency associated with cancer risk
What are symptoms of selenium toxicity?
What can result from high molybdenum?
Inhibition of copper absorption
*can be used to treat wilson disease (excessive Cu in liver)