Select TWO events that occur when a neurotransmitter binds and activates an excitatory synapse. a. Ca2+ ions move into pre-synaptic cell
b. Na+ ions move into post-synaptic cell
c. The probability of firing an action potential is decreased
d. The probability of firing an action potential is increased
e. Cl- ions move into post-synaptic cell

Key points

Neurons communicate with one another at junctions called synapses. At a synapse, one neuron sends a message to a target neuron—another cell.

Most synapses are chemical; these synapses communicate using chemical messengers. Other synapses are electrical; in these synapses, ions flow directly between cells.

At a chemical synapse, an action potential triggers the presynaptic neuron to release neurotransmitters. These molecules bind to receptors on the postsynaptic cell and make it more or less likely to fire an action potential.

Explanation:

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