The higher the frequency of the sound, the faster the basilar membrane vibrates
Different places on the basilar membrane vibrate more depending on the pitch
8. Which photoreceptor provides colour information?
Cones
Rods
9. What is the first stage of conversion in sensation?
Sensation is produced when the message reaches the brain
Transduction
Accessory structures modify physical stimulus
Sensory nerves send transduced neural energy to the brain
10. One limitation of place theory states that below what frequency, no place on the membrane vibrates more, yet a person can still distinguish tones below this?
50,000Hz
1000Hz
100,000Hz
5000Hz
11. Cones sensitive to long wavelengths produce the sensation of which colour?
Green
Red
Blue
12. What is volleying?
How sound increases brain plasticity
When there is alternation in the firing of hair cells
How vision is measured
13. What is the second stage of conversion in sensation?
Sensation is produced when the message reaches the brain
Accessory stimulus modify physical stimulus
Transduction
Sensory nerves send transduced neural energy to the brain
14. Which photoreceptor contains rhodopsin?
Rods
Cones
15. What causes photopigment in the photoreceptor to break down?
Light
Time
Heat
Chemical reaction
16. What is the first stage of how photoreceptors create sensations?
Information from rods and cones is conveyed to ganglion cells (via bipolar cells) which sends info up the optic nerve to the brain.
All information from the eye meets at the optic chiasm which reroutes it to the thalamus, and then to the visual cortex.
Information from the left visual field goes to the right cerebral hemisphere and vice versa.
17. What is the fourth stage of conversion in sensation?
Sensory nerves send transduced neural energy to the brain
Sensation is produced when the message reaches the brain
Transduction
Accessory stimulus modifies physical stimulus
18. Define noise
Random excitation or inhibition of neurons that either increases or decreases the sensed intensity of a physical stimulus
Disturbance in the environment which affects volume
19. What percentage of times does a person need to be able to detect a stimulus, in order for it to meet the absolute threshold?
75%
100%
50%
25%
20. What is the difference threshold?
The physical intensity at which a person can detect a stimulus 50% of the time
The smallest amount of change in a stimulus before a change is detected
