Bio 256 2F

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souimet05
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203334
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Bio 256 2F
Updated:
2013-02-25 15:56:33
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Bio 256 Exam
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02.20.13 02.22.13
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  1. Chemoreceptors
    • detect chemicals in aqueous solustion
    • smell 
    • taste
    • extracellular chemicals
  2. photoreceptors
    detect light
  3. thermoreceptors
    detect temperature change
  4. mechanoreceptors
    detect physical changes by cell membrane deformation
  5. Nociceptors
    pain receptors
  6. proprioreceptors
    detect body position
  7. Phasic receptors
    fire quickly when first stimulated but then slow their firing to "adapt" to the stimulus
  8. Quick Adaption to..
    • odor
    • temp
    • touch
  9. Tonic receptors
    • fire at a constant rate when stimulus is present and stop when stimulus is removed
    • no adaption 
    • ex. pain
  10. Pacinian (lamellar) Corpuscles (Pressure)
    • detect deep pressure and fast vibrations
    • Phasic response due to lamellation
  11. somatesthetic
    all cutaneous receptors
  12. Receptive Field
    area of skin innervated by sensory neuron
  13. olfactory
    gustatory
    visual
    auditory
    • smell
    • taste
    • sight
    • hearing
  14. Taste buds
    • in papillae of tongue mucosa
    • found on tongue
  15. Three papillae types
    • filiform
    • fungiform
    • circumvallate
  16. Five basic taste sensations
    • Sweet
    • salt
    • sour
    • bitter
    • umami
  17. To be tasted a chemical:
    • must be dissolved
    • must contact gustatory hairs
  18. Taste is ___ % olfaction
    80
  19. Olfactory Organ
    olfactory epithelium, covers the superior nasal concha
  20. Olfactory Receptor Cells
    Bipolar neurons with radiating olfactory cilia
  21. Vestibular apparatus
    • equilibrium receptors in the semicircular canals and vestibule
    • maintains orientation and balance in space
    • vestibular receptors monitor static equilibrium
  22. Maculae
    sensory receptors for static equilibrium
  23. Otolithic membrane
    jellylike mass studded with tiny CaCO3 stones called otoliths
  24. Utricular hairs
    respond to horizontal movement
  25. saccular hairs
    respond to vertical movement
  26. Crista ampullaris
    receptor for dynamic equillibrium
  27. 3 modes of input for balance and orientation
    • vestibular receptors
    • visual receptors
    • somatic receptors
  28. outer ear
    • Auricle (pinna)
    • external auditory canal 
    • tympanic membrane
  29. Middle Ear
    • Auditory Ossicles
    • Cochlea
  30. Inner Ear (inside chochlea)
    sound detected, generator pontentials stimulated> impulse to CNS
  31. Frequency
    number of waves passing a given point in a given time (Hz)
  32. Pitch
    perception of different frequencies
  33. Amplitude
    intensity of sound (dB)
  34. Loudness
    subjective interpretation of amplitude
  35. Bony Labyrinth
    • convoluted channels through temporal bones
    • includes:
    • vestibule
    • cochlea
    • semicircular canals
  36. Membranous layrinth
    series of membranous sacs within the bony labyrinth
  37. Scala Vestivuli
    Connected to vestivule

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