Which of the following is the correct order of steps in transmission between two neurons?
1. Neurotransmitters are released into the synaptic cleft.
2. Receptors on the postsynaptic membrane bind neurotransmitters.
3. An action potential travels down an axon and reaches the presynaptic membrane.
4. Synaptic vesicles move to and bind with the presynaptic membrane.
5. Binding of neurotransmitters causes excitation or inhibition.
O
A. 2, 3, 1, 5,4
B.5, 4, 3, 2, 1
C.3,4, 1, 2,5
D. 4, 3, 1, 2,5
E. 1, 2, 3, 4, 5

C

Explanation:

Firstly, an action potential travels down to an axon and reaches the presynaptic membrane. After that synaptic vesicles move to and bind with the presynaptic membrane. Than, neurotransmitters are released into the synaptic cleft. In the next step, receptors on the postsynaptic membrane bind the neurotransmitters. In the last step, binding neurotransmitters cause excitation or inhibition.

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