Reflex Arc 0.0 / 5 ? BiologyReceptors and StimuliA2/A-levelAQA Created by: Luna HufflepuffCreated on: 17-10-17 15:50 What is the first stage of the reflex arc? A receptor detects a stimulus. 1 of 5 What is the second stage of the reflex arc? A sensory neurone transmits the action potential from the receptor to the Central Nervous System. 2 of 5 What is the third stage of the reflex arc? A relay neurone coordinates a response by triggering action potentials in the motor neurones. 3 of 5 What is the fourth stage of the reflex arc? Action potentials travel down the motor neurone, triggering a response. 4 of 5 What is the fifth stage of the reflex arc? The action potentials cause the effector to move, removing the body part from the stimulus. 5 of 5
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