3. Why do we say that light is an electromagnetic wave? Describe the relationship among wavelength, frequency, and speed for light. 4. What is a photon? In what way is a photon like a particle? In what way is it like a wave? 5. List the different forms of light in order from lowest to highest energy. Is the order the same from lowest to highest frequency?
Serum: Plasma: 1: Serum is the undiluted, extracellular portion of blood after adequate coagulation is complete. Plasma is a clear, straw-colored watery portion of the blood in which several types of blood cells are suspended. 2: Serum is part of blood which lack clotting factor. Plasma is composed of serum and clotting factor. 3
A serum iron test measures how much iron is in your serum. Serum is the liquid that is left over from your blood when red blood cells and clotting factors have been removed. The serum iron test can reveal abnormally low or high blood iron levels. Your doctor will most likely order this test after another lab test shows an abnormal result.