12-8 Information processing

Question 1

What are the types of postsynaptic potentials

Answer 1

Excitatory postsynaptic potential (EPSP)
* Graded depolarization of postsynaptic membrane
* Inhibitory postsynaptic potential (IPSP)
* Graded hyperpolarization of postsynaptic membrane

Question 2

what are the types of summations

Answer 2

Temporal summation
* Rapid, repeated stimuli at a single synapse
Spatial summation
* Simultaneous stimuli arrive at multiple synapses

Question 3

What happens when a neuron becomes facilitated

Answer 3

As EPSPs accumulate
* And raise membrane potential closer to threshold
* Until a small stimulus can trigger action potential

Question 4

What is a axoaxonic synapses

Answer 4

• Synapses between axons of two neurons