PSYA01H3 Chapter Notes - Chapter 3: Autoreceptor, Reuptake, Enzyme

33 views4 pages
12 Aug 2016
School
Department
Course
(1) The action potential travels down the axon and (2) stimulates the release of neurotransmitters from
vesicles. (3) The neurotransmitters are released into the synapse, where they float to bind with receptor
sites on a dendrite of a postsynaptic neuron, initiating a new action potential. The neurotransmitters are
cleared out of the synapse by (4) reuptake into the sending neuron, (5) being broken down by enzymes
in the synapse, or (6) binding to autoreceptors on the sending neuron.
A given neuron may make a few thousand synaptic connections with other neurons, so neuron
what tells the dendrites which of the neurotransmitters flooding into the synapse to receive?
oOne answer is that neurons tend to form pathways in the brain that are characterized
by specific types of neurotransmitters; one neurotransmitter might be prevalent in one
part of the brain, whereas a different neurotransmitter might be prevalent in a different
part of the brain.
oA second answer is that neurotransmitters and receptor sites act like a lock-and-key
system. Only some neurotransmitters bind to specific receptor sites on a dendrite. The
molecular structure of the neurotransmitter must “fit” the molecular structure of the
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows page 1 of the document.
Unlock all 4 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
1 Booster Class