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One of the effects of adrenaline on the heart is that it:

Question
One of the effects of adrenaline on the heart is that it:
Slows the heartbeat
Makes the heart beat faster, supplying more oxygen to muscles
Stops the heartbeat temporarily
Has no effect on the heart
Answer
Makes the heart beat faster, supplying more oxygen to muscles
Detailed Explanation
Adrenaline acts on the heart, causing it to beat faster, which results in more oxygen being supplied to the muscles.
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