Science (086) — AI-generated practice question

Nervous System: Uses electrical impulses transmitted through neurons to carry information rapidly to specific target organs (muscles/glands). Actions can be reflex, voluntary, or involuntary.

Endocrine System: Uses hormones secreted into the bloodstream to carry chemical signals to target organs. A feedback mechanism regulates hormone release.

Comparison:
| Feature | Nervous System | Endocrine System |
|---|---|---|
| Medium | Electrical impulses | Chemical (hormones) |
| Speed | Fast | Slow |
| Effect | Short-lived, specific | Long-lasting, widespread |

Advantage of Nervous System: Response is extremely fast, enabling immediate reactions (e.g., reflex actions).

Advantage of Endocrine System: Hormones travel through blood and reach all cells of the body, enabling widespread, long-lasting effects (e.g., adrenaline prepares entire body for fight-or-flight).

Source: Chapter 6, Sections 6.1 and 6.3

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• Examiners expect a direct comparison of speed, medium, and duration, plus one advantage each — clearly stated.
• The fight-or-flight example (squirrel/adrenaline) from the textbook is the ideal illustration for the endocrine advantage.
• A small table saves words and scores well for comparison questions.
• Do not write long paragraphs — this is 3 marks, so stay crisp.