Months After Last Taking a Drug, a Former Drug Abuser

question 49

Multiple Choice

Months after last taking a drug, a former drug abuser still produces very little serotonin. The person is depressed and anxious and has great difficulty remembering new material. MOST likely, the abused substance was:

• A) Ecstasy.
• B) cannabis.
• C) LSD.
• D) benzodiazepine.

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Definitions:

Myoglobin

A crimson-colored protein, which includes heme, responsible for transporting and holding oxygen within muscle cells, and closely resembles the structure of hemoglobin.

Motor Units

Refers to the combination of a motor neuron and the skeletal muscle fibers innervated by that motor neuron's axonal terminals.

Muscle Fibers

Long, slender cells that make up muscles, capable of contracting to produce movement in parts of the body.

Trained Muscle

Muscle that has undergone physiological changes due to exercise, enhancing its strength, endurance, or size.