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

Anatomy & Physiology

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To which of the following organic groups does a steroid belong?

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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

Anatomy & Physiology

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

Anatomy & Physiology

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).

Anatomy & Physiology