When a stimulus is applied to a receptor in the skin, an action potential is propagated along a neuron to the brain, where another signal is sent back to the muscle for a response. Which of the following best describes what occurs when the action potential reaches a chemical synapse at the end of an axon?
A. The action potential jumps from one axon to the next connecting axon.
B. The action potential travels through the synapse to the next connecting dendrite.
C. The action potential jumps the synapse to the next connecting dendrite.
D. The action potential causes a release of neurotransmitters that travel across the synapse.
Answer: D
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AP Biology
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