The Activation of Light-Sensitive Retinal Proteins in Our Eyes Signals

question 65

Multiple Choice

The activation of light-sensitive retinal proteins in our eyes signals our brains to decrease production of

• A) melatonin.
• B) serotonin.
• C) acetylcholine.
• D) dopamine.

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Definitions:

Fentanyl

A powerful synthetic opioid analgesic that is similar to morphine but is 50 to 100 times more potent, used medically for severe pain management.

Opioids

A class of drugs that include the illegal drug heroin, synthetic opioids such as fentanyl, and pain relievers available legally by prescription, used primarily for pain relief and anesthetic purposes.

Cross-Tolerance

A phenomenon in which tolerance to the effects of a certain drug produces tolerance to another drug, usually because both drugs share similar mechanisms of action.

Drug Group

A classification of medications or compounds with similar chemical structures, mechanisms of action, therapeutic uses, or side effects.