What is the combined benefit of increased heartbeat and breathing rate in an emergency?
Answer and explanation
Correct answer: More oxygen and energy reach the muscles
The governing concept is coordinated fight-or-flight physiology. An increased breathing rate brings oxygen into the lungs more rapidly, while a faster heartbeat delivers oxygen and glucose-rich blood to active muscles more quickly. Together these changes support rapid respiration and ATP production for emergency movement, making option A correct. Root emergence, insulin production by the thyroid, and smell detection by photoreceptors are biologically unrelated, so B, C, and D are incorrect.
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What is the correct answer to this question?
More oxygen and energy reach the muscles
Why is this the correct answer?
The governing concept is coordinated fight-or-flight physiology. An increased breathing rate brings oxygen into the lungs more rapidly, while a faster heartbeat delivers oxygen and glucose-rich blood to active muscles more quickly. Together these changes support rapid respiration and ATP production for emergency movement, making option A correct. Root emergence, insulin production by the thyroid, and smell detection by photoreceptors are biologically unrelated, so B, C, and D are incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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