Reception of Stimuli 0.0 / 5 ? BiologyCellular processesA2/A-levelEdexcel Created by: francesca_321Created on: 01-03-16 22:09 What two cells are sensitive to light? Rods and COnce cells 1 of 24 What doe Cones allow? colour vision in bright light 2 of 24 What do rod cells allow? Black and white vision 3 of 24 In rods the molecule is a purplish pigment what is it called? Rhodopsin 4 of 24 The neurone of the ganglion cell connects to what neurone? Bipolar neurone 5 of 24 What vesicles are in the outer membrane? vesicles, membranes containing photochemical pigments 6 of 24 Where are the rod and cone cells found? Outer segment 7 of 24 What is behind the outer segment? pigmented epithelium in choroid 8 of 24 What is behind the pigmented epithelium? Sclera 9 of 24 In the dark what diffuses into the outer segment? Sodium ions 10 of 24 Through what? open cation channels 11 of 24 What then moves down the gradient? SOdium ions 12 of 24 What gets pumped out on the inner segment? Sodium ions actively pumped out 13 of 24 What is the membrane depolarised to? -40 mV 14 of 24 What is released which binds to bipolar cells? neurotransmitters 15 of 24 preventing it from? depolarising 16 of 24 What is broken down? Rhodopsin 17 of 24 What is closed? Sodium ion channels 18 of 24 What is actively pumped out? Sodium ions 19 of 24 What is hyperpolarised? membrane 20 of 24 What isnt released? Neurotransmitter 21 of 24 What opens? Cation channels in and bipolar cells open 22 of 24 What becomes depolarised? membrane 23 of 24 Generating a what? an action potential in the neurone of the optic nerve 24 of 24
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