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melissag94
on FreezingBlue Flashcards.
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specialized to respond to specific changes in environment of the cell
neural receptors
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organization of neural system is ___ of how it works
50%
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2 classifications of neural receptors?
- type of stimulus
- body location
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4 types of stimulus?
- mechanical
- thermal
- chemical
- electromagnetic
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touch, stretch receptors
mechanical stimulus
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responds to change in temperature
thermal stimulus
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sensitive to change in chemical environment of cell
chemical stimulus
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responds to changes in light, visual info
electromagnetic stimulus
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body location of neural receptors
- exteroreceptors
- enteroreceptors
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located close to surface of body
exteroreceptors
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located deep within body, gathers info from things inside body
enteroreceptors
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ex of enteroreceptors
liver temperature
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all receptors give same response of?
membrane potential
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depolarization of the receptor membrane
generator potential
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third type of membrane potential
generator membrane potential
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localized and cannot be transmitted
generator potential
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must be capable of evoking action potentials in a peripheral process of the sensory neuron
generator potential
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generator potential response is graded according to
stimulus strength
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NOt an all of nothing response
generator potential
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the stronger the _____, the greater the ____
- stimulus
- generator potential
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maintained for as long as the stimulus is present
generator potential
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the longer the stimulus is present, the ____ is maintained
generator potential
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3 diff potentials?
- generator
- action
- resting membrane
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action potentials cannot
overlap
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4 types of coding action potentials
- stimulus quality
- stimulus location
- stimulus strength
- duration of stimulus
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type of receptor
coding for stimulus quality
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location of receptor
coding fro stimulus location
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coding for stimulus strength?
- frequency of action potential
- number of receptors stimulated
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low GP=, high GP =
- low frequency of AP
- high frequency of AP
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strong stimulus =
high GP, constant AP
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weak stimulus =
weak GP, widely spaced AP
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highest rate of frequency =
150 AP/sec
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as a stimulus gets stronger and stronger, more receptors
respond
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as long as stimulus is present, continue to get action potentials
coding for duration of stimulus
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process of becoming less responsive to continued presence of stimulus
adaptation
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adaptation can be
slow, intermediate or fast
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rapidly adapting unit
touch receptor
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ex of adaption
barrel recpetors of blood pressure most not stop
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2 actions of local anesthetics?
- receptor vs nerve fiber
- temporary vs reversible
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in order to have action potential must have
cell membrane
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LEFT OFF AT SYNAPSE where recording begins
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