Biology for IGCSE & O level - Coordination And Response (Section 3 - No. 44)
Which of the following best describes the action of adrenaline?
Decreases heart rate and breathing rate.
Decreases blood sugar level and reduces metabolism.
Increases heart rate and breathing rate.
Causes the kidneys to retain more water.
Explanation
Adrenaline prepares the body for 'fight or flight'.
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