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Title: The sodium-potassium exchange pump (Multiple Choice) Post by: jje5027 on Mar 10, 2014 1.) The sodium-potassium exchange pump
A) transports potassium ions out of the cell during repolarization. B) transports sodium ions into the cell during depolarization. C) moves sodium and potassium in the direction of their chemical gradients. D) must re-establish ion concentrations after each action potential. E) requires ATP to function (I think it is E but I am unsure)... 2.) When voltage-gated K+ channels of a resting neuron open, A) the neuron depolarizes. B) K+ enters the neuron. C) K+ enters the neuron and the neuron depolarizes. D) K+ leaves the neuron. E) K+ leaves the neuron and the neuron depolarizes. (Also think its E...?) Title: Re: The sodium-potassium exchange pump Post by: savio on Mar 10, 2014 2.) When voltage-gated K+ channels of a resting neuron open, A) the neuron depolarizes. B) K+ enters the neuron. C) K+ enters the neuron and the neuron depolarizes. D) K+ leaves the neuron. E) K+ leaves the neuron and the neuron depolarizes. D 1.) The sodium-potassium exchange pump A) transports potassium ions out of the cell during repolarization. B) transports sodium ions into the cell during depolarization. C) moves sodium and potassium in the direction of their chemical gradients. D) must re-establish ion concentrations after each action potential. E) requires ATP to function E Title: Re: The sodium-potassium exchange pump Post by: jje5027 on Mar 10, 2014 Thanks savio! What about this one...
Ion concentrations are first significantly affected after ________ action potential(s). A) a few million B) a few hundred C) a few thousand D) a few dozen E) one Title: Re: The sodium-potassium exchange pump Post by: savio on Mar 10, 2014 Title: Re: The sodium-potassium exchange pump Post by: jje5027 on Mar 10, 2014 Content hidden
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