W8 Flashcards

1
Q

What are the parts of the ear?

A
  1. Tympanic membrane 2. Hammer 3. Anvil (Amboss) 4. Stirrup (Steigbügel) 5. Oval window 6. Vestibule 7. Cochlea
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2
Q

What are the parts of the inner ear?

A
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3
Q

What happens when inner ear hair cells are moved?

A

They open K+ channels- depolarisation - give off neurotransmitter

These cells revover very quickly because they can immediately open K+ cahannes on the other side of the cells, and release the K+. This is made possible my the different concentrations of K+ in scala media and scala tympani.

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4
Q

The vibration of which part of the inner ear causes the sound?

A

Basilar membrane

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24
Q

Zusammenfassung Visuelle Transduktionskaskade

A

-Licht aktiviert Photopigment (11cis Retinal wird zu all-trans Retinal)

  • Rhodopsin aktiviert Transduzin (trimeres G-Protein)
  • a Untereinheit des aktivierten Transduzin disoziiert und aktiviert cGMP Phosphodiesterase (PDE) Aktivierte PDE hydrolysiert cGMP
  • cGMP gekoppelte Kanäle schliessen
  • Zelle hyperpolarisiert und schüttet weniger Neurotransmitter aus
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25
Q

Signaltransduktion in olfaktorischen Rezeptorneuronen

A
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26
Q

Stäbchen

A
  1. sehr lichempfindlich, skotopisch
  2. enthält viel Photopigment
  3. hochverstärkend
  4. niedrige zeitliche Auflösung
  5. niedrige räumliche auflösing
  6. monochromatisch
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27
Q

Zapfen

A
  1. wenig lichtempfindlich, photopisch
  2. enthält weniger Photopigment
  3. niedrigverstärkend
  4. hohe zeitliche Auflösung
  5. hohe räumliche Auflösung
  6. trichromatisch - RGB
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28
Q
A
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