L8 Neurobiology of sensing

11 important questions on L8 Neurobiology of sensing

In which two types can sensory receptors cells be broadly classified?

Type I and II

What do type I sensory receptors do?

Type I cells are specialised membrane on the distal portion of the afferent nerve fiber that projects to the central nervous system.

What do type II sensory receptors do?

Type II sensory receptor cells are specialised receptor cells that connect to one or more afferent nerve fibers by synapse like structures.
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What is NOT a structure in the middle ear?
- Stapes
- Incus
- Tympanus
- Maleus

Not:
Tympanus

Structures of middle ear are:
- Stapes
- Incus
- Maleus

Fill in the blank:
......... And ........... Operate similarly as both require ionic exchange across the receptor membrane triggered by force.

Audition and tactile sensing
Audition and mechanosensation
proprioception and tactile sensing
proprioception and audition

the above all possible

ezelsbruggetje: MAg AT PoT PA

Which of the following is not a neocortical region that processes sensory information?
- Primary somatosensory cortex
- secondary somatosensory cortex
- primary visual cortex
- primary auditory cortex
- olfactory bulb

Not a neocortical region that processes sensory information:

Olfactory bulb

Neocortical region that does process sensory information:

- Primary somatosensory cortex
- secondary somatosensory cortex
- primary visual cortex
- primary auditory cortex


fill in the blanks:Projections from sensory periphery targeting the central nervous system is lateralised. Decusation of projections along the ________ pathway happens in the brain stem, and along the ________ pathway in the thalamus.
- olfactory / auditory
- somatosensory / visual
- olfactory / somatosensory
- auditory / visual
- somatosensory / auditory

Somatosensory / visual
auditory / visual

Dus:
Somatosensory & Auditory -> brainstem
Visual -> thalamus

Sensory organs contain sensory receptors and structures that conduct physical stimuli to the receptors.

Sensory receptors across mammalian sense

Sensation starts with sensory transduction, how does this work?

Sensory transduction Strats with activation of a specialised region of the cell membrane by a physical (including chemical) stimulus to which it is sensitive.

If this physical stimulation results in a change in membrane conductance, and a subsequent change in the membrane potential (generation of a receptor potential), then sensory information is transmitted to the central nervous system in the form of action potentials.

By which kind of physical stimuli can pain receptors (nociceptors) be activated?

  • Mechanical
  • Chemical (e.g. acidity)
  • Thermal
  • Inflammation / Injury
  • Polymodal (i.e. Combination of factors above)

What is the difference between the two superclasses of sensory receptors?

Effe opzoeken, iets met extra connection: Iets van Type II needs an extra afferent projections to function

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