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29 Cards in this Set
- Front
- Back
Refractory period |
A resting pause that occurs after a neuron has fires; subsequent action potentials can not occur until the axon returns to its resting state |
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All or none response |
A neuron’s reaction of either firing (with a full-strength response) or not firing |
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Synapse |
Junction between Axon tip of sending the neuron and dendrite or cell body of the receiving neuron |
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Chemical transmission |
Chemical messengers |
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Neurotransmitters |
Released from neuron into the synapse, and goes to the receptors on the dendrites is the receiving neuron |
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Receptors |
Are binding sites for chemicals |
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Reuptake |
Reabsorbed by sending nueron |
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Everything psychological |
Every idea, every mood, every urge is biological |
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Biological psychologists |
Study the links between biology and behavior |
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Cells in the body |
Neurons and glial cells |
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Neurons (nerve cells) |
Building blocks of the nervous system; consists of ( the soma, dendrites, axon, myelin sheath, and terminal buttons) |
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Soma (cell body) |
Is the cells life support center |
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Dendrites |
Fibers that receive messages from other cells |
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Axon |
Passes messages away from the cell body to other neurons or to muscles or glands |
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Myelin sheath |
Covers the axons of some neurons and helps speed neural impulses |
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Terminal buttons |
Of axons form junctions with other cells |
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Action potential |
a brief electrical charge that travels down an axon |
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Threshold |
The level of stimulation required to trigger a neural impulse |
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Acetylcholine (ACh) |
Enables muscle action, learning and memory |
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Info travels through three types of neurons |
Sensory (afferent), motor(efferent), and interneurons. |
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Gaba |
Major inhibitory neurotransmitter |
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Glutamate |
Major excitatory neurotransmitter |
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Endorphins |
Natural, opiate- like neurotransmitters linked to pleasure and released in response to pain and exercise |
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Agonist |
Molecule that increases a neurotransmitter’s action |
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Antagonist |
Molecule that inhibits or blocks a neurotransmitter’s action |
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Nervous system |
Body’s speedy communication network, consisting of the nerves cells of: central nervous system, peripheral nervous system, and nerves |
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Central nervous system |
Brain and spinal cord |
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Peripheral nervous system |
Sensory and motor neurons connecting the central nervous system to the rest of the body( gathers and transmits info) |
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Nerves |
Bundled axons forming neural cables connecting CNS with muscles, glands, and sense organs |