The ability to bend light rays against both fixed and rotating filters is:

Which of the following statements regarding colloid statements is TRUE?

a. Colloids readily diffuse into the extravascular space for fluid replacement. b. Colloids exert osmotic pressures that draw fluids into the vascular space for volume replacement. c. Colloids do not contain proteins or sugars; therefore they do not make suitable solutions for volume replacement. d. Colloids are inexpensive, have and long shelf-life, and are widely used among most EMS communities.

Laboratory tests provided to individual consumers on request are referred to as ________

Fill in the blank with correct word.