A Molecule That Enters the Body from an External Source

question 16

Multiple Choice

A molecule that enters the body from an external source and alters its normal functions is a(an)

• A)agonist.
• B)antagonist.
• C)drug.
• D)hormone.
• E)steroid.

---

Definitions:

Emotional Arousal

The complex psychological and physiological state of being awoken or stimulated to action by emotions.

Validity

The ability of a test to measure what it was designed to measure.

Deception

The act of misleading or tricking someone by concealing or distorting the truth.

Pauses

Brief stops or breaks in activity or speech, often used for emphasis or to reflect, gather thoughts, or create suspense.