A Mistake by the Cellular Machinery, or Damage from an Environmental

question 7

Multiple Choice

A mistake by the cellular machinery, or damage from an environmental agent such as radiation, may produce a ________, which is a permanently altered segment of DNA.

• A) susceptibility gene
• B) vulnerability gene
• C) longevity gene
• D) mutated gene

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Definitions:

Psychoactive Drugs

Drugs that act on the nervous system to alter consciousness, modify perception, and change moods.

Dopamine

Dopamine is a neurotransmitter that plays a major role in reward-motivated behavior, mood, and the regulation of movement and emotional responses.

Epinephrine

Also known as adrenaline, a hormone and neurotransmitter involved in the body's fight-or-flight response, increasing heart rate, muscular strength, and blood sugar.

Brain's Reward Pathways

Neural pathways in the brain that are activated by reward-related stimuli, playing a key role in the mechanisms of pleasure and reinforcement.