Flashcards
Nervous Systems III
Flashcards do conjunto (30)
- 1Diagram of the earPinna
External ear canal
Tympanic membrane
Ossicles
Oval body
Cochlea
Auditory vestibular nerves - 2Function of pinnaAct as parabolic reflectors to collect sound
- 3MOAPinna -> tympanic membrane -> ossicles -> motion at oval window membrane -> moves fluid in cochlea
- 4What does movement of fluid in cochlea cause?A response in sensory neurons
- 5Anatomy of the cochleaScala vestibulia
Scala media
Scala tympani
Basilar membrane - 6Diagram of frequency propagationLow f propagate all the way from base to the apex
Base \ basilar membrane \ apex - 7Diagram of how sound stim blablablahBasilar membrane
Hair cells
Tectorial membrane
Spiral ganglia - 8Hair cell featuresstereocilia
lack axons (no AP)
sandwiched btw. basilar + tectorial membrane - 9What constitutes the signal?As basilar moves in response to sound
stereocilia bend, this stimulation is synpased w/ spiral ganglion - 10What do position of hair cell indicate?Position along basilar membrane indicates frequency of the sound (mexican wave)
- 11What sort of relationship is thisTONOTOPIC RELATIONSHIP
- 12Auditory cortex2'
500Hz 1000 Hz 2000 Hz 4000Hz 8000Hz 16000Hz - 13What is the eardrum equivalent in insects?Tympanum in legs
- 14DiagramTympanum
muscle
BV
crista acoustica
Auditory neuron - 15What is tonopy?spatial arrangement of where sounds of different frequency are processed in the brain.
- 16Tonopy in insects processed where?prothoracic ganglion
- 17What is Johnston's organ?Antennal hearing organ in mosquitoes for detecting f of female wing beats
- 18What is the f of female wing beats?360-400Hz
- 19How does the Johnston's organ do this?Active process in sensory neurons amplify the signal, making the organ extremely sensitive to the sound
- 20Insects vs. vertebrates Vibration detected byMembrane/appendage/hair
Tympanic membrane - 21AmplificationSome amplification via active response of sensory dendrites
Several amplificatory processes (e.g. external ear, ossicles, cochlear) - 22TonopyRare in CNS
Common in CNS - 23Signal natureSpecific, few in number, simple
Complex - 24How are vibrations detectedSubsonic vibration via hair
Vibration detection present like lateral line organs in fish - 25Signal transduction in taste cells SALT and ACIDSalt and Acid have Na+ and H+ channels
K+ efflux channel
Depolarise
Open V gated Ca++
Cause neurot. release - 26Signal transduction in taste cells SWEET and BITTER and UMAMIGPCRs that bind to food molecules
Depolarise
K+ channel blocked
V gated Ca++ open
Neurot released - 27Vertebrae olfaction diagram (5)Olfactory bulb
Olfactory glomerulus
bone
Olfactory receptor
Olfactory epithelium - 28Olfactory neuronAxon
Soma
Denrite
Cilia
Nasal secretions - 29Olfactory transfuctionBinding of odour molecules causes G protein SU to stim. adenylyl cyclase
This ^ cAMP
This opens ion channels in CM
Depolarises
AP generated - 30Where do invertebrae taste and olfactory chemosensory R molecules lie?On outer membrane of cilia
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- O usuário eliminou as informações de disciplina FlashCards sobre Nervous Systems III, criado por Usuário eliminado em 07-05-2018.
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- Usuário eliminado · mai 2018
- Atualizado
- 7 mai 2018
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- Criado por J yadonknow · 6 mai 2018
- Copiado por J yadonknow · 7 mai 2018
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