Down Syndrome in Humans Is Caused By

question 6

Multiple Choice

Down syndrome in humans is caused by:

• A)an extra X chromosome.
• B)an extra y chromosome.
• C)three copies of chromosome 21.
• D)three copies of chromosome 13.
• E)a single copy of chromosome 21.

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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.