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Learning objective

Explain (HT only) how adrenaline increases heart rate and increases oxygen and glucose delivery to the brain and muscles.

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Topic

Hormonal coordination in humans

Subtopic

Feedback systems (HT only)

Aqa Gcse BiologyHomeostasis and response

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Quick explanation

Explain (HT only) how adrenaline increases heart rate and increases oxygen and glucose delivery to the brain and muscles

  • This point belongs to Hormonal coordination in humans, especially Feedback systems (HT only).
  • You need to be able to explain (HT only) how adrenaline increases heart rate and increases oxygen and glucose delivery to the brain and muscles.
  • The key ideas to know are glucose, heart rate, and HT only.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

glucoseheart rateHT onlyadrenaline

Why it matters

This objective helps connect Feedback systems (HT only) to exam-style questions, flashcards, and revision notes for Hormonal coordination in humans.

Quick student answer

Why does (HT only) how adrenaline increases heart rate and increases oxygen and glucose delivery to the brain and muscles?

Direct answer

In Biology, this page helps you answer questions about (HT only) how adrenaline increases heart rate and increases oxygen and glucose delivery to the brain and muscles within Hormonal coordination in humans. Focus on the key process, correct scientific terms, and how the idea links to exam-style questions. Key terms to check are adrenaline and heart rate.

Key terms

  • adrenaline: A hormone secreted by the adrenal glands that increases heart rate and enhances oxygen and glucose delivery to the brain and muscles during stress or fear.
  • heart rate: The number of times the heart beats per minute, which is increased by adrenaline to prepare the body for rapid action.

Common trap

Misunderstanding Adrenaline's Effects: Emphasize that adrenaline not only increases heart rate but also enhances the delivery of oxygen and glucose to the brain and muscles, which is crucial for the body's response to stress or fear.

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