The Appendix Is a Narrow Tube Which Traps Microorganisms from the Digestive

question 81

Multiple Choice

The appendix is a narrow tube which traps microorganisms from the digestive tract, and these microorganisms enter its wall and activate memory lymphocytes for long-term immunity. Another immune organ that traps microorganisms is the

• A) thymus.
• B) bone marrow.
• C) palatine tonsil.
• D) the spleen.

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Definitions:

Positron-Emission Tomography

A diagnostic imaging test that uses a radiotracer to visualize and measure changes in metabolic processes and in other physiological activities including blood flow, regional chemical composition, and absorption.

Radio Waves

Electromagnetic waves with the longest wavelengths in the electromagnetic spectrum, used in communication systems to transmit data over long distances.

Magnetic Fields

A vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

Pineal Gland

A small, pea-shaped gland in the brain that produces melatonin, a hormone that regulates sleep-wake cycles.