Intro | Presynaptic Neuron | Postsynaptic Neuron | Terminal Button | Axon | Neural Impulse | Synaptic Vesicles | Neurotransmitter Molecules | Cell Membrane | Transmitter does not fit at receptor | Transmitter fits receptor | Receptor Sites | Synaptic Cleft
Part 1: Image-Mapped Tutorial
Part 2: Matching Self-Test
Part 3: Multiple-Choice Self-Test
1. The Presynaptic Neuron carries information away from the neuron via the axon.
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Some specialized synapses have receptor sites on the presynaptic membrane, known as presynaptic receptors. Typically, the activation of a presynaptic receptor will inhibit the release of neurotransmitters into the synaptic cleft. Occasionally, activation will facilitate neurotransmitter release. An autoreceptor is a presynaptic receptor that responds to the neurotransmitter released by the same neuron. This arrangement may provide negative feedback for the neuron, reducing neurotransmitter release in response to increased concentration in the synaptic cleft.