Organ Systems Integration in Animals · NCERT Biology

During physical exercise, which systems work together to meet increased energy demand?

  1. Nervous, endocrine, and reproductive
  2. Respiratory, circulatory, and muscular
  3. Digestive, excretory, and nervous systems
  4. Skeletal, digestive, and integumentary
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Correct answer: Respiratory, circulatory, and muscular

Exercise increases oxygen and nutrient demand in muscles. Respiratory, circulatory, and muscular systems coordinate to meet this demand.

Difficulty: Medium Question 5 of 20

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