The Virtual Exchange of Photons Can Produce

question 15

Multiple Choice

The virtual exchange of photons can produce

• A)a repulsive force.
• B)an attractive force.
• C)either a repulsive or an attractive force.
• D)neither a repulsive nor an attractive force.

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Definitions:

Combining Form

A linguistic element used in the construction of medical and scientific terminology that generally consists of a root and a vowel to ease pronunciation when combined with another form.

Cancer

A broad term for a large group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

Abbreviation

The act of shortening a word or phrase to create a simpler or more compact form, usually employing the initial letters.

PSA

Prostate-Specific Antigen, a protein produced by the prostate gland, levels of which are tested to screen for and monitor prostate cancer.