At a synapse, the neuron that responds to the neurotransmitter is the ______ neuron.

• A. sensory
• B. postsynaptic
• C. motor
• D. presynaptic

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the structure of a synapse. A synapse is the junction between two neurons where communication occurs. It consists of a presynaptic neuron (sending the signal) and a postsynaptic neuron (receiving the signal).
2. Step 2: Recall the role of neurotransmitters. Neurotransmitters are chemical messengers released by the presynaptic neuron into the synaptic cleft to transmit signals to the postsynaptic neuron.
3. Step 3: Identify the neuron that responds to the neurotransmitter. The postsynaptic neuron has receptors that bind to the neurotransmitter, allowing it to respond to the signal.
4. Step 4: Differentiate between sensory, motor, presynaptic, and postsynaptic neurons. Sensory neurons detect stimuli, motor neurons control muscles, presynaptic neurons release neurotransmitters, and postsynaptic neurons receive and respond to neurotransmitters.
5. Step 5: Conclude that the correct answer is 'postsynaptic,' as it is the neuron that responds to the neurotransmitter at the synapse.