AQA · Biology · 8461
GCSE Biology: Human endocrine system
Homeostasis and response · AQA GCSE Biology (8461), specification point 4.5.3.1. Cards are generated from the exam board's own specification for "Human endocrine system", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is the endocrine system composed of?
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Glands that secrete hormones directly into the bloodstream.
What are hormones?
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Chemicals secreted by endocrine glands directly into the blood, which carries them to a target organ where they produce an effect.
Hormones are transported around the body by the ?.
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blood
Where does a hormone produce its effect?
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At its target organ.
How does the speed of hormonal effects compare with nervous effects?
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Hormonal effects are slower than nervous effects.
How does the duration of hormonal effects compare with nervous effects?
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Hormonal effects act for longer than nervous effects.
Which gland is known as the 'master gland' of the endocrine system?
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The pituitary gland, located in the brain.
Why is the pituitary gland called a 'master gland'?
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It secretes several hormones in response to body conditions, and these hormones act on other glands to stimulate the release of further hormones.
Where in the body is the pituitary gland located?
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In the brain.
What triggers the pituitary gland to secrete its hormones?
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Body conditions (changes in the body's internal state).
Which endocrine gland is found in the neck?
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The thyroid.
Which endocrine glands sit on top of the kidneys?
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The adrenal glands.
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