PhysioEx Exercise 3 Activity 1-6 Questions and Answers Solved Correctly Rated A+
150 mM - Answers What is the approximate concentration of K+ inside a typical cell (intracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
5 mM - Answers What is the approximate concentration of K+ outside a typical cell (extracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
5 mM - Answers What is the approximate concentration of Na+ inside a typical cell (intracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
150 mM - Answers What is the approximate concentration of Na+ outside a typical cell (extracellular
concentration)?
a. 150 mM
b. 5 mM
, c. 0 mM
d. 15 mM
both inside the cell body and inside the axon - Answers A negative membrane potential was recorded
when the tip of the microelectrode was
a. in the extracellular solution, just outside the cell body
b. just inside the cell body
c. just inside the axon
d. both inside the cell body and inside the axon
an increase in extracellular K+ - Answers Which of the following caused a change in membrane potential
from -70 to -40 in the cell body?
a. an increase in extracellular K+
b. a decrease in extracellular K+
c. an increase in extracellular Na+
d. a decrease in extracellular Na+
between the inside of the axon and the outside of the axon with control K+ - Answers Which of the
following has the most negative voltage?
a. between the outside of the axon and outside the cell body with control K+ ECF
b. between the outside of the axon and outside the cell body with High K+ ECF
c. between the inside of the axon and the outside of the axon with control K+ ECF
d. between the inside of he axon and the outside of the axon with the High K+ ECF
a change to -60 mV - Answers Assuming that the resting potential of a sensory neuron is -70 mV, which
of the following represents a depolarization?
a. a change to -90 mV
150 mM - Answers What is the approximate concentration of K+ inside a typical cell (intracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
5 mM - Answers What is the approximate concentration of K+ outside a typical cell (extracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
5 mM - Answers What is the approximate concentration of Na+ inside a typical cell (intracellular
concentration)?
a. 150 mM
b. 5 mM
c. 0 mM
d. 15 mM
150 mM - Answers What is the approximate concentration of Na+ outside a typical cell (extracellular
concentration)?
a. 150 mM
b. 5 mM
, c. 0 mM
d. 15 mM
both inside the cell body and inside the axon - Answers A negative membrane potential was recorded
when the tip of the microelectrode was
a. in the extracellular solution, just outside the cell body
b. just inside the cell body
c. just inside the axon
d. both inside the cell body and inside the axon
an increase in extracellular K+ - Answers Which of the following caused a change in membrane potential
from -70 to -40 in the cell body?
a. an increase in extracellular K+
b. a decrease in extracellular K+
c. an increase in extracellular Na+
d. a decrease in extracellular Na+
between the inside of the axon and the outside of the axon with control K+ - Answers Which of the
following has the most negative voltage?
a. between the outside of the axon and outside the cell body with control K+ ECF
b. between the outside of the axon and outside the cell body with High K+ ECF
c. between the inside of the axon and the outside of the axon with control K+ ECF
d. between the inside of he axon and the outside of the axon with the High K+ ECF
a change to -60 mV - Answers Assuming that the resting potential of a sensory neuron is -70 mV, which
of the following represents a depolarization?
a. a change to -90 mV
