Histologically, the 'postsynaptic density' (PSD) is best described as:
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Correct answer: A protein-rich region under the postsynaptic membrane
The postsynaptic density is an electron-dense area visible under electron microscopy. It contains neurotransmitter receptors, scaffolding proteins, and signaling enzymes specialized for receiving signals.
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More Synapses questions
- Which type of synapse allows for the bidirectional flow of ions and incredibly rapid signal transmission?
- Which protein, found on the vesicle membrane, acts as the primary calcium sensor for fusion?
- SNARE proteins are essential for which stage of synaptic transmission?
- Excitatory synapses (Gray's Type I) are typically characterized by which histological features?
- Inhibitory synapses (Gray's Type II) often exhibit which appearance under electron microscopy?
- What is the function of the enzyme Acetylcholinesterase at the synapse?