Senses Flashcards
Name the receptor for sight, taste, smell and hearing
receptor for sight: cones, bipolar cells and ganglion cells
receptor for taste: g-protein which activate the trm calcium channel
receptor for smell: G-protein coupled receptors
receptor for hearing: K
Name the 5 cell types in the retina
- Photoreceptors
(cones and rods) - Horizontal cells
- Bipolar cells
- Amacrine cells
- Ganglion cells
(their axons form
the optic nerve)
Name the difference between rods and cones
*Rod: light sensitive
receptor for black/
white vision.
*Cone: less sensitive
receptor for coloured
light.
Where is the best colour vision located?
In the fovea
There is no sight in ….
the optic disc
Describe how the light pathwork works
When there is light, glutamate says yes to the next cells called the bipolar cells and this turns the on-center on.
when there is no light, glutamate says no and this makes the off cell happy, these cells sends a message to your brain with no light.
Where do high frequencies resonate and where do low frequencies resonate?
High frequencies resonate at the base and low frequencies resonate at the tip
How are action potentials in the ear generated?
Action potentials of the hair cells are generated by K+ influx. dus omgekeerd dan normaal
How do the middle ear and cochlea work?
The middle ear translates the vibration into mechanical movement. then the organ of corti translates these vibrations to action potentials.
How are smells detected by the brain?
Smells are detected by the olfactory receptor neurons (GPCR) in the olfactory bulb. This is then projected to the brain: olfactory cortex.
Name the different receptors for taste
sweet, bitter and umami: gpcr which activate the trm calcium channel.
salt and acids depolarise through the ion channels; NA for salt and H+ for acids
