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BIOLOGY
11.3 Coordination and Control
11.3.4 Hormones vs Nervous Control
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Created by
Kriti Kochhal
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Cards (13)
What are hormones?
Chemical messengers
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How do hormones travel in the body?
They travel in the
blood
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What do hormones target?
Target
organs
or cells
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What destroys hormones in the body?
The
liver
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What system releases hormones into the blood?
The
endocrine
system
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What is adrenaline?
A
hormone
released from
adrenal glands
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What effect does adrenaline have on pupils?
Pupils
dilate
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How does adrenaline affect heart rate?
Heart rate
increases
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What happens to breathing rate when adrenaline is released?
Breathing rate
increases
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What does adrenaline do to glycogen?
Breaks down
glycogen
,
raising
blood
glucose
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What is the effect of adrenaline on blood flow to the brain?
Vasodilation
of arteries increases blood flow
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How does adrenaline affect blood flow to the gut?
Vasoconstriction
of arteries decreases blood flow
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What are the main differences between hormonal and nervous control?
Hormonal control uses chemical messengers (
hormones
)
Nervous
control uses electrical signals (
nerve impulses
)
Hormonal
responses
are slower but longer-lasting
Nervous responses are faster but
shorter-lived
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