In an Immunodiffusion Test to Diagnose Histoplasmosis, a Patient's Serum

question 1

Multiple Choice

In an immunodiffusion test to diagnose histoplasmosis, a patient's serum is placed in a well in an agar plate. In a positive test, a line forms as the serum diffuses from the well and meets material diffusing from a second well. What type of test is this?

• A) an ELISA test
• B) an agglutination reaction
• C) a complement- fixation test
• D) a direct test
• E) a precipitation reaction

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Definitions:

Reasoning

The process of thinking about something in a logical way in order to form a conclusion or judgment.

Limbic System

A complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood. It controls the basic emotions (fear, pleasure, anger) and drives (hunger, sex, dominance, care of offspring).

Earliest Part

The initial segment or beginning portion of something, typically referring to time, structures, or processes.

Brain

The organ in the head of humans and other vertebrates that coordinates the body's activities, interpreting sensory information and being the center of thought and emotion.