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If adrenaline secretion increases, which change helps provide more energy to muscles?

Answer and explanation

Correct answer: Increased heartbeat and breathing rate.

Adrenaline is an emergency hormone that prepares the body for rapid action. Its effects include increasing heart rate and breathing rate. Faster circulation delivers more blood and glucose to active muscles, while faster breathing improves oxygen intake; these support increased aerobic respiration and ATP production. Thus option A gives the relevant change. The other choices are unrelated to the emergency response and cannot explain increased energy supply to muscles.

Related tags

AdrenalineMuscle EnergyEmergency ResponseControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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