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sympathetic sys
fight or flight
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parasympathetic sys
rest & digest
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diencephalon
- includes thalamus and hypothal
- in forebrain
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telencephalon
- in forebrain
- includes the 2 hemispheres
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thalamus
- relays and processes sensory info
- forebrain
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hypothalamus
- controls emotions and autonomic functions
- hormone secretions
- forebrain
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corpus callosum
what holds the 2 hemispheres tgth
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cerebrum
has the hemispheres
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frontal lobes
- voluntary movement, reasoning & problem solving
- cerebral cortex
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parietal lobes
- general sensations
- cerebral cortex
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temporal lobe
- audio, smell, short term mem, emotion, language comprehension
- cerebral cortex
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occipital lobe
- visual sensation
- cerebral cortex
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medulla
- hindbrain
- relays info®ulates autonomic functions
- secretes hormones
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pons
- hindbrain
- some autonomic f and coordinates movement
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cerebellum
- hindbrain
- coordinates complex movements
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adrenal medulla
- part of symp. sys
- secretes epinephrine
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exteroreceptors
detects stim. from outside
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interoreceptors
detects stim from inside
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mechanoreceptors
respond to mechanical disturbances
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chemoreceptors
respond to particular chemicals
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norireceptors
pain receptors
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thermoreceptros
- responds to changes in temp
- cold-sensitive, warm-sensitive, thermal nocireceptors (xtreme hot)
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electromagnetic receptors
stim by electromag. waves
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proprioreceptors
many diff receps that refer to awareness of ur position so u know where ur parts are
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hyperopia
- far sightedness
- "hyper" means more so far
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presbyopia
farsightedness but in old age
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feature detection theory
explains why certain parts of our brains light up when we see a particular image
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parallel processing
many visual stimuli are processed at once so we can understand it quicker
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absolute threshold
minimum stimulation intensity to activate sensory receptors
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difference threshold
minimum noticeable difference btwn 2 stimuli
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signal detection theory
predicts how and when someone will see a signal depending on bg stim present
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autocrine
hormones modify the activity of the cells that secrete them
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hormones
- bind to ligand gated receptors on target cells
- peptide hormones bind to receptors in memb
- steroid hormones diffuse thru and bind to receps in cytoplasm
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tropic hormones
- hormones that have other hormone glands as target cells
- hypothal releases them that target ant. pit.
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hypophyseal portal system
mini circulatory system whereby hormones from hypothal can get to anterior pituitary without having to circulate thru the body to get there
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cortisol
- steroid hormone secreted by adrenal cortex
- deals w stress
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thyroxine
- secreted by thyroid gland
- increases metabolic rate and temp
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how eye works
- light comes in and refracts thru the cornea and then travels thru aqueous humour and goes thru the pupil which is encircled by the iris and then it refracts again thru the lens which accommodates the light so it travels thru the vitreous humour and hits the retina.
- Retina has cones (colour, 3) and rods that're all in the macula. optic disc has no photoreceptors and is beside the macula (blind spot), and behind it is optic nerve that sends signals to the brain
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