PSYCH 112 Chapter Notes - Chapter 3: Reuptake, Oligodendrocyte, Somatic Nervous System

22 views2 pages
21 Oct 2015
School
Department
Course
Professor
Chapter 3 Text Notes
Neuron anatomy:
Cell body (soma)- vital to survival of neuron, creates the components necessary to make the
neuron
Dendrites- extensions of the soma, act as neural “receivers” of information
Axons/axon terminals- act as neural “transmitters”, transmit synaptic vesicles through the axon
until they reach the axon terminal and burst to release neurotransmitters
Synapse- gap between neurons that neurotransmitters are released into and travel through
- Neurotransmitters (from the pre-synaptic neuron) in the synapse bind with receptor
cites along dendrites of other neurons (in the post-synaptic neuron) to facilitate
communication between neurons, called neurotransmission
oNeurotransmission can be halted by reuptake of neurotransmitters
Synaptic vesicles reabsorb the neurotransmitter
Glial cells- surrounding cells of the nervous system, have several types:
Astrocytes- involved in thought, memory, and immune system
- Abundant in the blood-brain barrier around blood vessels to block out large particles
and bacteria
Oligodendrocyte- promotes new connections among neurons and also make up the
myelin sheath
Node- gap in the myelin sheath that allows transmissions to be expedited by jumping between
nodes
- Facilitates “passive conduction” between stretches of myelin
Resting potential- the “potential difference” (voltage) of a neuron with no neurotransmitters
acting on it
Action potential- “all or none” response that sends positive charge traveling from soma to axon
terminal
- Initially creates very positive charge, but then overcompensates in its correction of
charge, so it becomes more negative than normal
Absolute refractory period- a brief interval after firing during which a neuron cannot fire again
Types of neurotransmitters:
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
Monthly
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.