NROS EXAM III questions with correct answers
what is the dark current and what causes it - Answer -Dark current is the pumps and channels that are involved in the Visual Signal Transduction Pathway -In the dark, there is an increase in cGMP What effect does light have on the membrane potential of rods and cones - Answer -an increase in light increases the membrane potential of cones -a decrease I light increases the membrane potential of rods Draw Signal Transduction Pathway - Answer in notes What is visual adaption? Describe 3 mechanisms for it - Answer -change in perception when exposed to a new or intense stimuli. -bight light ----3 mechanisms ----activation and inactivation of sodium channels ----- Mech 1 (Recoverin - Arrestin) Predict the acute effects of the following on your ability to detect light. A)Decrease Arrestin B) Constitutively active rhodopsin kinase C) GTPgammas-S
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