PSYC 3320 FINAL EXAM STUDY GUIDE
Neuroanatomy - Answers -the study of the structure of the nervous system
Forebrain (prosencephalon) - Answers -telencephalon and diencephalon
midbrain (mesencephalon) - Answers -tectum and tegmentum
hindbrain (rhombencephalon) - Answers -metencephalon and myelencephalon
temporal summation - Answers -repeated stimuli occurring within a brief time can have
a cumulative effect
spatial summation - Answers -several synaptic inputs originating from separate
locations can have a cumulative effect
action potential step 1 - Answers -a stimulus starts depolarization of the membrane;
positively charged sodium ions rush into a
action potential step 2 - Answers -Potassium channels open, potassium begins to leave
the cell
- sodium channels close
action potential step 3 - Answers -Refractory Phase- after the sodium gates open, they
close and go into an inactive conformation.
chemical transmission step 1 - Answers -neurotransmitter synthesis- The large
peptides are synthesized in the cell body of the neuron and are transported to the
synaptic terminal through the axon.
chemical transmission step 2 - Answers -neurotransmitter packaging and release; once
the NTs are synthesized, they need to be packaged into vessicles
chemical transmission step 3 - Answers -neurotransmitter release- As the vesicles fuse
with the membrane, the neurotransmitters are "expelled" into the synaptic cleft.
chemical transmission step 4 - Answers -NT binding- The neurotransmitters can now
diffuse through the synaptic cleft, until they reach the postsynaptic neuron; the chemical
signal is translated to an electrical signal
chemical transmission step 5 - Answers -stopping the chemical signal; Some
neurotransmitters will be degraded, some will be transported back to the presynaptic
terminal to be recycled, and sometimes they are "absorbed" by the postsynaptic
terminal
