BIO2242 – LECTURE 13
When you perceive a leaf to be green your eyes detect mostly
The typical flavor of onions is mostly derived from the activity of:
A single receptor class on your tongue
Multiple receptor classes on your tongue
Multiple receptor classes in your nose
A single receptor class in your nose
Mechanoreception II Hearing:
Hearing is the perception of propagated sound waves. They are received by
vibrating membranes that respond to oscillations in pressure on that membrane.
Hearing is by tympanic organs, such as eardrums or membrane-like structures.
They are modified trachea.
Those insects that have tympanic organs also produce sounds for
A1 is very sensitive is detects the echolocation sounds of the bats
A2 is tune to much higher levels of sounds hence less sensitive. It starts firing
when the intensity is so high, where the bat is very close.
Insects: Chordotonal organs:
Insects us to detect movement of cuticle.
Not all use it for hearing.
Male mosquitoes use it to detect the sounds female mosquitoes make.
Made up of 3 compartments:
Outer ear = ear lobs, pinna, tympanic membrane
Middle ear = air filled cavity
Inner ear where all the detections happen
Pinna = collect sounds
Outer and inner hair cells are moved by the tectorial membrane
Inner ear acoustics:
Fluid moves hair cells of organ o