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1) Voltage dependent channels open through opening a gate that is a voltage sensor. Determine the names of these gates required for opening Na and K channels?
A) p(Na) and t(K) gates
B) p(Na) and t(K) gates
C) p(Na) and t(K) gates
D) p(Na) and t(K) gates
2) K is at equilibrium across the surface membrane of a neuron that has a resting potential of -55 mV. If the intracellular concentration of K is 120 mM, the extracellular concentration of K is ?
A) 15 mM
B) 5 mM
C) 20 mM
D) 10 mM
3) Under normal physiological conditions, the intracellular Ca2 concentration of a cell is 100 nM and extracellular Ca2 concentration is 2mM and the equilibrium potential for Ca2 is 125mV. However, in a patch clamp experiment, the reversal (equilibrium) p
A) Elevated the external Ca2 concentration above 2 mM
B) Reduced the external Ca2 concentration below 2 mM
C) Elevated the internal Ca2 concentration above 100 nM
D) Reduced the internal Ca2 concentration below 100nM
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