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Increase in heartbeat and breathing rate during fear is related to which hormone?

Answer and explanation

Correct answer: Adrenaline

The governing concept is the emergency or fight-or-flight response. In a frightening situation, the adrenal glands release adrenaline. This hormone increases heart rate, breathing rate and blood flow to muscles so that the body can respond rapidly and obtain more oxygen and energy. Thyroxine regulates general metabolism, insulin regulates blood glucose, and growth hormone supports growth; none gives this immediate fear response. Hence option C is correct.

Related tags

Control CoordinationAdrenalineEmergency ResponseEndocrine SystemControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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