chapter 2 psych.txt
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What are the parts of a neuron?
- Myelin Sheath
Phases of Neuron impulse cycle?
- action potential(firing)
- Recovery phase
- Resting phase
What is the all-or-nothing law?
Neurons are either working or not
What are the functions of the glial cell?
- Tumor development
What are mirror neurons?
neurons that fire when you watch another action
What is synapse?
a space gap between 2 neurons
What is reuptake?
- the process of chemicals/electric charge going into a neuron
- after it enters the synapse
What is a neuro transmitter?
chemicals that carry messages across synapse
What is an excitatory message?
- a chemical that causes the neuron to be more
what is an inhibitory message?
decreases the likelyhood that a neuron will fire
What is acetylcholine?
- excitatory in the brain and autonomic system
- inhibitory everywhere else
- causes muscle movement
What is seritonin?
- located in the nervous system
- inhibitor effect
- regulates sleep, eating, mood, pain and depression
What is dopamine?
- located in the nervous system
- inhibitory or excitatoy
- movement control(muscles)
- too much causes schizophrenia
- too little causes parkinson's disease
What are endorophins?
- located in nervous system
- primary inhibiory, except in hippocampus
- functions are pain suppression
- pleasurable feelings, appetites, placebos
what happens during runner's high?
- when endorphins are released after long periods of muscle stress
- this is to releive pain.
What is in the centeral nervous sstem?
brain and spinal cord
What is somatic/skeletal division?
- divided into sensory and motor
- sensery afferent>to the brain
- motor efferent>away from the brain
What is behavioral genetics
study of effects of heredity on behavior
What is a viation of HOXA1 gene?
What is autism
a disorer that affects language an social functions
What is te pituitary gland?
the master gland of the human body
What does the endocrine system do?
secreetes hormones that affect growth
- what is oxytocin
- a hormone released b the pituitary gland that causes
- contraction of the uterus during labor and stimulates
- the ejection of milk
What are some effects of steroid abuse?
- heart attacks
- and violent behavior
what is an electroencephalogram(EEG)?
- electrodes wired on te scalp
- measure electric brain waves during sleep and thought
- used to diagnose seizures
What is positron Emission Tomograpphy(PET)?
- inject radioactive glucose into bloodstream
- uses x-ray to show levels of high activity
What is Transcranial magnetic Stimulation (TMS)?
temporarily interupting the brain
What is Functional magnetic resonance imaging (FMRI)?
- uses radio waves to generate signals
- computer in tunnel picture thing
What does the medula control?
heart rate and respiration
What does the cerebellum control?
balance and vision
What is the reticular formation?
a route to the higher brain centers
what does the thalamus do?
sends sensory messages upward
What does the hypothalamus do?
- maintains homeostasi
- eating drinking, temperature, emotion
What does the cerebral cortex do?
sophisticated info processing in brain
what is neuroplasticity?
- changes in the brain that occur throughout life span
- relating to new neurons and connections
What does the left hemisphere do?
in charge of language and sequential activities
What does te right hemisphere do?
emotion, art, music, perception
what is bio feedback?
when a person learns how to control bp, hr, rr....
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