Chapter 2 (Barlow) Flashcards
Long molecules of deoxyribonucleic acid (DNA) at various locations on
chromosomes, within the cell nucleus.
Genes
Individuals inherit tendencies to express certain traits or behaviors, which may then be activated under conditions of stress
Diathesis–stress model
Condition that makes someone susceptible to developing a disorder.
Diathesis
Indicates that genetic endowment may increase the probability that an individual will experience stressful
life events
Gene–environment correlation model
How environment can change gene expression
Epigenetics
Knowing how the nervous system and, especially, how the brain works is central to any understanding of our behavior, emotions, and cognitive processes.
Neuroscience
End of an axon
Terminal button
Brain uses an average of 140 billion nerve cells, called?
Neurons
Information is transmitted through electrical impulses, called?
Action potentials
Space between the terminal button of one neuron and the dendrite of another
Synaptic cleft
Biochemicals that are released from the axon of one neuron and transmit the impulse to the dendrite receptors of another neuron
Neurotransmitters
Neurons that increase the likelihood that the connecting neuron will fire
Excitatory
Neurons that decrease the likelihood that the connecting neuron will fire.
Inhibitory
Endocrine gland produces its own chemical messenger, called?
Hormone
Paths may overlap with the paths of other neurotransmitters
Brain circuits
Effectively increase the activity of a neurotransmitter by mimicking
its effects
Agonists
Decrease, or block, a neurotransmitter
Antagonists
Produce effects opposite to those produced by the neurotransmitter.
Inverse agonists
Afer a neurotransmitter is released, it is quickly broken down and brought
back from the synaptic cleft into the same neuron that released it.
Reuptake
Excitatory transmitter that “turns on” many different neurons, leading to action.
Glutamate
Inhibitory neurotransmitter; inhibit (or regulate) the transmission of information and action potentials.
GABA
Regulates our behavior, moods, and
thought processes.
Serotonin
4 neurotransmitter system in the monoamine class important to psychopathology
Glutamate
GABA
Norepinephrine
Dopamine