BMS1032 special senses

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1. light hits the cells in the retina is which order? out of 1) rods and cones, 2)pigment epithelium, 3) ganglion cells, 4) bipolar cells

  • 3,2,4,1
  • 1,2,3,4
  • 3, 4,1 ,2
  • 4,3,2,1
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2. What is the prosthetic group associated with the protein in dark-adapted rhodopsin

  • retinoic acid
  • cGMP
  • all-trans-retinal
  • 11-cis-retinal
  • CaCo3

3. light activated photopigment from _ to _:

  • all-trans retinal to cis opsin
  • all-trans-retinal to 11-cis-retinal
  • 11-cis-retinal to all-trans-retinal
  • retinal to opsin

4. Which of these is false about oldfaction?

  • cells are depolarised when receptors activated
  • each odorant binds to a specific G protein coupled receptor
  • humans have 170cm2 of oldfactory epithelium covered in receptors
  • activation of the G protien opens a cation channel

5. the apoprotein in photopigment is?

  • opsinal
  • opsin
  • retinal
  • rhodopsin

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