Massachusetts State Board Esthetics Practice Exam

What term refers to the fluid created during an infection that contains white blood cells and bacteria?

1. Pus

2. Serum

3. Plasma

4. Secretions

The correct answer is: Pus

The term that refers to the fluid created during an infection, which contains white blood cells and bacteria, is pus. Pus is a thick, yellowish or greenish fluid that accumulates at the site of infection as the body’s immune system responds to invading microorganisms. It consists primarily of dead white blood cells, specifically neutrophils, that have fought the infection, as well as cellular debris and live or dead bacteria. This accumulation indicates that the body is actively working to combat the infection, and the presence of pus often signifies the need for medical attention or treatment. The other terms provided refer to different bodily fluids. Serum is the clear liquid that separates from blood when it clots, primarily containing water, electrolytes, and proteins. Plasma is the liquid component of blood that makes up about 55% of its volume, containing water, salts, enzymes, antibodies, and other proteins but not the cellular components such as white blood cells. Secretions generally refer to fluids released by glands, which can include a variety of substances like mucus, but do not specifically pertain to the body's response to infection.