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