HLSC 2410: MEMBRANE POTENTIALS EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What is membrane potential?
the voltage difference across a membrane
What type of charge exists outside of the membrane?
Net positive charge
What type of charge exists inside the membrane?
Net negative charge
What effects membrane potential (voltage)?
Movement of ions across the membrane (current)
What factors encourage ions to move across the membrane?
Concentration gradient and electrical gradient
Concentration gradient
Ions want to move from an area of higher concentration to lower concentration
What is the concentration of sodium, calcium, and chloride outside of the cell?
Higher
What is the concentration of potassium outside the cell?
Lower
Electrical gradient
Ions want to move towards opposite charges
Where do positively charged ions want to move?
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What is membrane potential?
the voltage difference across a membrane
What type of charge exists outside of the membrane?
Net positive charge
What type of charge exists inside the membrane?
Net negative charge
What effects membrane potential (voltage)?
Movement of ions across the membrane (current)
What factors encourage ions to move across the membrane?
Concentration gradient and electrical gradient
Concentration gradient
Ions want to move from an area of higher concentration to lower concentration
What is the concentration of sodium, calcium, and chloride outside of the cell?
Higher
What is the concentration of potassium outside the cell?
Lower
Electrical gradient
Ions want to move towards opposite charges
Where do positively charged ions want to move?
