2/11/2017 Neurobiology Chapter 4: Channels and Transporters Flashcards | Quizlet 1/7 20 terms gibbons530 Neurobiology Chapter 4: Channels and Transporters B (pg.57) The proteins that establish ionic gradients are called __. A) passive transporters B) active transporters C) voltage-gated ion channels D) ligand-gated ion channels E) permeability transition pores C (pg.57-61) Individual ion channels __. A) were visualized with the advent of the voltage clamp in 1956 B) show the same time course as macroscopic ionic currents C) may pass thousands of ions per millisecond D) have a different voltage dependence than the macroscopic ionic current has E) have a different reversal potential than the macroscopic ionic current has D (pg.57-61) In which of the following ways do potassium channels in the squid giant axon differ from sodium channels? A) the potassium channels pass only a few ions per second B) the potassium channels show little voltage dependence C) the summing of the individual potassium channels does not reconstruct the macroscopic current
2/11/2017 Neurobiology Chapter 4: Channels and Transporters Flashcards | Quizlet 2/7 D) once the potassium channels open in response to a voltage step command, they tend to remain open E) all of the above B (pg.59) Which of the following is NOT a variant of the patch clamp technique? A) cell attached B) intracellular C) whole cell D) inside-out patch E) outside-out patch E (pg.62) Animal toxins have been discovered that __. A) block sodium channels B) prolong the open state of sodium channels C) alter the voltage-dependence of sodium channels D) block potassium channels E) all of the above E (pg.63-64) A surprising result that emerged from the molecular analysis of ion channels was the __.
- Fall '14
- Ion channel