The Complement Fixation Test Uses Red Blood Cells as the Target

question 33

Multiple Choice

The complement fixation test uses red blood cells as the target for complement activation. Test serum containing antibodies is combined with a known amount of antigen in a tube, and then the RBCs and antibodies against the RBCs are added. A positive result for the complement fixation test would be

• A) loss of color in the tube.
• B) a cloudy solution in the tube.
• C) a line of precipitate near the bottom of the tube.
• D) a solution that is clear due to precipitation of RBCs.
• E) a fluorescent precipitate.

---

Definitions:

Purposive Sampling

A non-random sampling technique where subjects are selected based on their unique characteristics or qualities relevant to the research.

Snowball Sampling

A non-probability sampling technique where existing study subjects recruit future subjects from among their acquaintances.

Simple Random Sampling

A sampling method where each member of the population has an equal chance of being selected.

Expected Forms

Standardized or anticipated documents, procedures, or formats within a system or process.