Which trace element and function is correctly matched?
A. Manganese: essential component for synthesis of thyroid hormones
B. Iodine: constituent of several enzymes involved in digestion
C. Zinc: needed in blood clotting process
D. Iron: part of hemoglobin molecule
Answer: D
You might also like to view...
The simple columnar epithelium that form absorptive cells of the digestive tract have which characteristic?
a. cilia b. fibroblasts c. a rich vascular supply d. dense microvilli
If the signal molecule acts on the cell that secreted it, the chemical is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
To which of the following organic groups does a steroid belong?
A. Lipid B. Nucleic acid C. Carbohydrate D. Vitamin E. Protein
When vasodilation doubles the vessel diameter, what is the change in resistance?
A. Reduced by half B. Doubles (twice the original value) C. Reduced by 1/4th of the original value D. Reduced to 1/16th of the original value