During an action potential the following events occur. A. Voltage gated sodium channels open and sodium flows out of the cell. B. Voltage gated sodium channels open and sodium flows into the cell. C. Voltage-gated potassium channels open and K flows out to repolarize the cell. Both B. and C. occur 3.
Synaptic transmission occurs between a neuron and another neuron, or a muscle or a gland.
A. Most synaptic transmission is chemical. In chemical synapses the synaptic cleft is 20 nm and is the distance a neurotransmitter must diffuse. C. Receptors on the post synaptic cell determine if a response is excitatory or inhibitory. It is important to remove a neurotransmitter from the synaptic cleft after it has been used for synaptic transmission. You are studying synaptic transmission by recording from a post-synaptic neuron.