Psych test 2 Flashcards
Three Tasks of Neurons
- Produce energy
- Capture information
- Pass information along nervous system
Dendrites
Finger-like ends of neuron
Axon
Fiber running down neuron
Synapse
Gap between neurons
Neurotransmitter
Chemical messenger
Myelin Sheath
Outer coating of the axon
Process of Neuron
- Dendrites receive impulse
- Electrical impulse travels down axon
- Axon terminals receive impulse, change to neurotransmitter
- Axon terminals fire neurotransmitter across the synapse
- Dendrites of the next neuron receive impulse, process repeats
Action Potential*
When neuron fires on impulse
Refractory Period*
Resting period while waiting for gates to open from neurotransmitter to dendrites
Resting Potential*
Positive charge on outside, negative charge on inside that causes it to become neurotransmitter
Receptor Cells*
On receiving neuron on dendrites
Subliminal
- What
- Example
- Below the threshold
2. The example where movies had popcorn/coke frames flash across the screen and the theater sold more concessions
Absolute Threshold
- What
- Example
- Least amount of stimuli detectable by your receptors.
2. Detecting sound in Kindergarten hearing test where the sound starts out silent
Threshold Difference
- What
- Example
- Amount of stimuli needed to detect a change in the original stimulus.
- crescendo from piano
Weber’s Law**
Amount of stimulus needed to detect a just noticeable difference is a fraction of the original stimulus.
Method of Adjustments
test subject controls the stimulus
Method of Limits
Experimenter controls the stimuli
Method of Constant Stimuli
Experimenter controls stimuli, randomly presents the stimulus
What are the two chemical senses?
Taste and Smell
Taste
- Receptor name
- Four tastes
- Optimal tasting temp.
- Taste buds
- Sweet, sour, bitter, and salty.
- 71 - 87 degrees Fahrenheit
Smell
1. Receptor name
2. How many smells?
first-later-now
- Olfactory membranes
2. four-six-ten
Five Smells?
spoiled chemical Flowery fruity burnt
Touch
- Receptor Name
- Function
- Epidermis
2. Detect pressure, pain, and temp.
Site Receptor Specificity Theory
Pain emanates from the SITE of the injury
Gate Control Mechanism Theory
- What/how
- example
- Pain message travels through gates getting to brain. If gate doesn’t open, pain message isn’t received by brain.
- Acupuncture
Sight
1. Receptor Name
rods and cones