Organ Systems Integration in Animals · NCERT Biology

Which system links the external environment to internal body responses most rapidly?

  1. Endocrine system
  2. Circulatory system
  3. Nervous system
  4. Immune system
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Correct answer: Nervous system

The nervous system transmits electrical impulses rapidly. This allows quick responses to changes in the external environment.

Difficulty: Medium Question 7 of 20

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