Which test measures the concentration of urea in the blood?

As a result of deep fiber friction, ______________ are released into the tissues, causing dilation of capillaries and encouraging circulation to the affected area

a. endorphins b. histamines c. leukocytes d. hemoglobin molecules

Steel has a memory when it is placed under stress and returns to its original shape when the stress has been removed; this is called __________

a. Corrosion b. Tensional c. Flexibility d. Buckling