HLSC 2410 LECTURE 4 ELECTRICAL PROPERTIES OF
MEMBRANES EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
What will opposite charges do?
attract each other and move toward each other
Cell/neuronal membranes have _________________ properties.
electrical
What affects the electrical properties of the plasma membrane?
the ions electrical charge
______________________ is a key to survival and an integral component of
cellular communication.
electricity
Are electrical signals fast or slow?
fast
What is it called when one side of the cell membrane is negative relative to the
other side?
membrane potential
True or False: All cells maintain a membrane potential.
true
What generates membrane potentials and are affected by transient changes in
these membrane potentials?
, neurons
What does transient mean?
change over time
What is needed to establish a membrane potential?
a very thin shell of change difference
What is electrical potential determined by?
the difference in the amount of charge between two points
What do changes in the electrical potential of a membrane alter?
the membranes ability to communicate
What does the electrical potential do?
helps neurons communicate and has potential to move ions which will produce currents
What is the resting membrane potential?
membrane potential of a cell that is not undergoing stimulation
Resting membrane potentials hold steady unless...
changes in electrical current alter potential
What is the resting membrane potential of neurons?
-70 mV
What are the determinants of the resting membrane potential?
concentration gradients, selective permeability of membrane, electrogenic pump
(Na+/K+ pump)
What produces a net outward current that contributes to the internal negativity of
the cell?
electrogenic pump
MEMBRANES EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
What will opposite charges do?
attract each other and move toward each other
Cell/neuronal membranes have _________________ properties.
electrical
What affects the electrical properties of the plasma membrane?
the ions electrical charge
______________________ is a key to survival and an integral component of
cellular communication.
electricity
Are electrical signals fast or slow?
fast
What is it called when one side of the cell membrane is negative relative to the
other side?
membrane potential
True or False: All cells maintain a membrane potential.
true
What generates membrane potentials and are affected by transient changes in
these membrane potentials?
, neurons
What does transient mean?
change over time
What is needed to establish a membrane potential?
a very thin shell of change difference
What is electrical potential determined by?
the difference in the amount of charge between two points
What do changes in the electrical potential of a membrane alter?
the membranes ability to communicate
What does the electrical potential do?
helps neurons communicate and has potential to move ions which will produce currents
What is the resting membrane potential?
membrane potential of a cell that is not undergoing stimulation
Resting membrane potentials hold steady unless...
changes in electrical current alter potential
What is the resting membrane potential of neurons?
-70 mV
What are the determinants of the resting membrane potential?
concentration gradients, selective permeability of membrane, electrogenic pump
(Na+/K+ pump)
What produces a net outward current that contributes to the internal negativity of
the cell?
electrogenic pump
