A synapse is the junction between neurons that allows electrical or chemical signals to pass from one cell to another. At a chemical synapse, an action potential in the presynaptic neuron causes neurotransmitters to be released into the synaptic cleft. These neurotransmitters then bind to receptors on the postsynaptic cell, causing ion channels to open and potentially triggering an action potential in that cell. Precise transmission of signals across synapses is crucial for normal nervous system function.

1. S Y N A P S E

4. HISTORY Charles Sherrington Ramón y Cajal

22. No Yes 6. Influenced by membrane potential Yes, but over shorter time Yes 5. Summation Yes Yes 4. Inhibition No Yes 3. Delay No Yes 2. Amplification Sometimes, usually not Always 1. Rectification Electrical synapses Chemical synapses Property PROPERTIES OF SINGLE CHEMICAL AND ELECTRICAL SYNAPSES

46. I thank all of you for your patience!