Mental health and dementiaQuestion 721 of 1700
Why can substances taken in excess lead to substance use disorder?
- They improve memory and help the person focus
- They calm and quiet the reward system of the brain
- They lower the need for sleep and make the person tired
- They overactivate the reward system
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Correct answer: They overactivate the reward system
Excess use activates the reward system so much that normal activities may be neglected.
Source: Nursing Assistant (Reuter), 10.4: Caring for Clients With Mental Health or Substance Use Disorders
Questions last reviewed: 18 October 2026