Shared Flashcard Set

Details

intro to neuroscience
Kolb and Whishaw Chapter 5
43
Psychology
Not Applicable
12/03/2011

Additional Psychology Flashcards

 


 

Cards

Term
acetylcholine
Definition
the first neurotransmitter discovered in the PNS and CNS; activates skeletal muscles in the somatic nervous system and may either excite or inhibit internal organs in the autonomic system
Term
epinephrine (adrenaline)
Definition
chemical messenger that acts as a hormone to mobilize the body for fight or flight during times of stress; neurotransmitter in the CNS
Term
norepinephrine
Definition
neurotransmitter found in the brain and in the sympathetic division of the ANS
Term
neurotransmitter
Definition
chemical released by a neuron onto a target with an excitatory or inhibitory effect
Term
synaptic vesicle
Definition
organelle consisting of a membrane structure that encloses a quantum of neurotransmitter
Term
synaptic cleft
Definition
gap that separates the presynaptic membrane from the postsynaptic membrane
Term
chemical synapse
Definition
junction at which messenger molecules are released when stimulated by an action potential
Term
presynaptic membrane
Definition
membrane on the transmitter-output side of a synapse
Term
postsynaptic membrane
Definition
membrane on the transmitter-input side of a synpase
Term
storage granule
Definition
membranous compartment that holds several vessicles containing a neurotransmitter
Term
electrical synapse
Definition
fused presynaptic and postsynaptic membrane that allows an action potential to pass directly from one neuron to the next
Term
dopamine
Definition
amine neurotransmitter that plays a role in coordinating movement, in attention and learning, and in behaviors that are reinforcing
Term
transporter
Definition
protein molecule that pumpes substances across a membrane
Term
transmitter-activated receptor
Definition
protein that has a binding site for a specific neurotransmitter and is embedded in the membrane of a cell
Term
autoreceptor
Definition
"self-receptor" in a neural membrane that responds to the transmitter released by the neuron
Term
quantum
Definition
quantity, equivalent to the contents of a single synaptic vessicle, that produces a just observable change in postsynaptic electric potential
Term
reuptake
Definition
deactivation of a neurotransmitter when membrane transporter proteins bring the transmitter back into the presynaptic axon terminal for subsequent reuse
Term
small-molecule transmitter
Definition
belongs to a class of quick-acting neurotransmitters synthesized in the axon terminal from productes derived from the diet
Term
rate-limiting factor
Definition
any enzyme that is in limited supply, thus restricting the pace at which a chemical can be synthesized
Term
serotonin
Definition
amine neurotransmitter that plays a role in regulating mood and aggression, appetite and arousal, the perception of pain, and respiration
Term
glutamate
Definition
amino acid neurotransmitter that inhibits neurons
Term
GABA
Definition
amino acid neurotransmitter that inhibits neurons
Term
histamine
Definition
neurotransmitter that controls arousal and waking; can cause the constriction of smooth muscles and so, when activated in allergic reactions, contributes to asthma
Term
neuropeptide
Definition
multifunctional chain of amino acids that acts as a neurotransmitter; act as hormones, may contribute to learning
Term
nitric oxide
Definition
acts as a chemical neurotransmitter gas in the activation of cellular metabolism
Term
carbon monoxide
Definition
acts as a neurotransmitter gas in the activation of cellular metabolism
Term
ionotropic receptor
Definition
embedded membrane protein with two parts: a binding site for a neurotransmitter and a pore that regulates ion flow to directly and rapidly change membrane voltage
Term
metabotropic receptor
Definition
embedded membrane protien, with a binding site for a neurotransmitter but no pore, linked to a G protein that can affect other receptors or act with second messengers to affect other cellular processes
Term
G protein
Definition
belongs to the family of guanyl-nucleotide-binding receptors coupled to a metabotropic receptors that, when activated, bind to other proteins
Term
second messenger
Definition
chemical that carries a message to initiate a biochemical process when activated by a neurotransmitter
Term
cholinergic neuron
Definition
neuron that uses acetylcholine as its main neurotransmitter
Term
activating system
Definition
neural pathways that coordinate brain activity through a single neurotransmitter; cell bodies are located in a nucleus in the brainstem and axons are distributed through a wide region of the brain
Term
schizophrenia
Definition
behavioral disorder characterized by delusions, hallucinations, disorganized speech, blunted emotion, agitation or immobility
Term
noradrenergic neuron
Definition
neuron containing norepinephrine
Term
major depression
Definition
mood disorder characterized by prolonged feelings of worthlessness and guilt, the disruption of normal eating habits, sleep disturbances, a general slowing of behavior, and frequent thoughts of suicide
Term
mania
Definition
disordered mental state of extreme excitement
Term
OCD
Definition
behavior disorder characterized by compulsively repeated acts and repetitive, unpleasant thoughts
Term
learning
Definition
relatively permanent change in behavior that results from experience
Term
habituation
Definition
learning behavior in which a response to a stimulus weakens with repeated stimulus presentations
Term
sensitization
Definition
learning behavior in which the response to a stimulus strenghtens with repeated presentations of that stimulus because the stimulus is stronger than normal
Term
PTSD
Definition
syndrome characterized by physiological arousal sympotoms related to recurring memories and dreams related to a traumatic event for months or years after the event
Term
associative learning
Definition
linkage of two or more unrelated stimuli to elicit a behavioral response
Term
long-term potentiation
Definition
in response to stimulation at a synapse, changed amplitude of an excitatory postsynaptic potential that lasts for hours to days or longer and plays a part in associative learning
Supporting users have an ad free experience!