Flashcards · Biology · Hormones and Reproduction
Adrenaline: Fight or Flight (Higher tier)
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Which gland makes adrenaline?
The adrenal gland.
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What is fight or flight?
The response of the body to a threat, which prepares it to fight or to run away.
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What happens to the heart rate when adrenaline is released?
It increases.
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What happens to the blood pressure?
It increases.
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What happens to the blood flow to the muscles?
It increases.
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What does adrenaline do to the liver?
It stimulates it to change glycogen into glucose.
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What happens to the blood sugar level?
It rises.
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Why does the muscle need more glucose?
For aerobic respiration to release energy.
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Why does the muscle need more oxygen?
For aerobic respiration.
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Why is the heart rate increased?
To deliver oxygen and glucose to the muscles faster.
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How is adrenaline carried round the body?
In the blood.
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What happens to the adrenaline when the danger has gone?
It is broken down, and the body returns to normal.
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What is a medical use of adrenaline?
To treat anaphylaxis, a severe allergic reaction.
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What is glycogen?
A store of glucose in the liver and muscles.
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Does adrenaline make muscles stronger?
No, it makes them work at their maximum for a short time.
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Common mistake about adrenaline?
Saying it makes the liver make glucose from nothing. It changes the stored glycogen into glucose.