Asked by Rijul Tuteja on May 11, 2024
Verified
Which of the following causes an unequal ion concentration across the resting plasma membrane?
A) The functioning of the sodium-chloride pump
B) Negatively charged proteins not readily diffusing across the plasma membrane
C) The attraction of chloride ions to other intracellular anions
D) The repulsion of potassium ions by the intracellular anions
E) The attraction of sodium ions to chloride ions
Unequal Ion Concentration
Refers to a difference in the concentration of ions across a membrane, leading to potential differences and driving forces for ion movement.
Sodium-chloride Pump
A mechanism, particularly in the kidney cells, that helps in the reabsorption or excretion of sodium and chloride ions.
Negatively Charged Proteins
Proteins that carry a net negative charge at physiological pH, often involved in cellular processes like DNA binding and enzyme regulation.
- Acquire knowledge about the electrical properties of muscle cells, including but not limited to, action potentials, resting membrane potential, and the contribution of ion channels.
Verified Answer
PP
priya parateMay 11, 2024
Final Answer :
B
Explanation :
Negatively charged proteins within cells contribute to the unequal ion concentration across the resting plasma membrane because they are too large to pass through the membrane easily, thus affecting the distribution of ions by retaining a negative charge within the cell.
Learning Objectives
- Acquire knowledge about the electrical properties of muscle cells, including but not limited to, action potentials, resting membrane potential, and the contribution of ion channels.