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grae-psychology
psychology
| Question | Answer |
|---|---|
| Myelin Sheath | Increases conduction speed on axons, Deteriorates with age, if it deteriorates then reaction time is slowed. insulation on axon |
| Parts of Neuron | Axons, Dendrites |
| Axon | single fiber that sends information to other neurons |
| Dendrite | Branch like fibers that receive information from other neurons |
| Neural transmission/ neurotransmitters | facilitate or inhibit the transmission of impulses from one neuron to the next, carry signal across synapse |
| action potential | inflow of ions |
| receptor sites | neurotransmitters attach to these on dendrites of receiving neurons in a lock and key fit |
| Dopamine | Neurotransmitter, involved in movement, mood, and emotion . gives euphric effects of cocaine, found in low levels in people w/ parkinsons disease |
| Endorphines | Neurotransmitter, blocks pain signals from body to brain, released during high stress |
| serotonin | Neurotransmitter sleep hunger and mood low levels in depression |
| Acytalcholine | Neurotransmitter learning and memory low levels in Alzheimer |
| Agonist | mimic neurotransmitter endorphin's mimicked by morphine and heroine |
| antagonist | block neurotransmitter curate blocks aceytylcholine |
| SSRI | Selective Serotonin Re-uptake Transmitters i.e. prozac |
| Peripheral Nercous System | includes all nerves not encased in bone nerves connecting the central nervous system to the rest of the body |
| Central nervous system | part of the nervous system comprising the brain and the spinal cord |
| somatic nervous system | sensory nerves that transmit info from the sense receptores eyes ears nose... |
| autonomic nervous system | operates w/out any conscious control heart glands... sympathetic nervous system parasympathec nervous system |
| Central Nervous system | spinal cord hindbrain brainstem medulla reticular formation part of the nervous system comprising the brain and the spinal cord |
| Hindbrain | a link between spinal cord and brain brainstem medulla retucualr formation cerebellum |
| medulla | part of the brainstem that controls hearbeat blood pressure, breathing coughing and swollowing |
| reticular formation | a structure in the brainsystem that play a crucial role in arousal and attention that screens sensory messages enetering the brain |
| midbrain | area that contains structures linking physiological funtions of the hindbrain to cognotive functions of forebrain substantia nigra |
| substantia nigra | controls unconcious motor movements |
| Forebrain | thalamus hypothalamus limbic system amygdala hippocampus largest part of the brain where cognitive functions as well as many of the motor functions of the brain are carried out. |
| Thalamus | structure located above the brainstem that acts as a relay station for info flowing into or out of the forebrain, injury can cause a vegetative state |
| hypothalamus | small influential brain structure that regulates hunger, thirst secual behavior, internal body temp,... |
| limbic system | group of structures in the brain including amygdala and hippocampus involved in emotion memory and motivation |
| amygdala | structure in limbic system important role in emotion particularly unpleasant stimuli |
| Hippocampus |
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grae6914
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