1. If postsynaptic membrane permeability is increased, is the neuron more easily stimulated or less excitable? 2. Explain the effect of the myelin sheath and the nodes of Ranvier on the conduction of...

1. If postsynaptic membrane permeability is increased, is the neuron more easily stimulated or less excitable?

2. Explain the effect of the myelin sheath and the nodes of Ranvier on the conduction of impulses.

3. Briefly describe, in the correct sequence, the events that occur in synaptic transmission.

4. Explain how and why surface receptors on neurons are specific for certain neurotransmitters?