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Questions and Answers
Why is the resting membrane potential (RMP) not exactly equal to the equilibrium potential of K ion?
Why is the resting membrane potential (RMP) not exactly equal to the equilibrium potential of K ion?
- Due to the presence of positive ion concentration gradient from outside to inside
- Due to the high permeability ratio of Na ions
- Due to the permeability of Na and Cl ions in addition to K ions (correct)
- Due to the low permeability ratio of K ions
What is the Nernst potential of K?
What is the Nernst potential of K?
- -100 mV
- -94 mV (correct)
- -86 mV
- -70 mV
What does Goldman's equation take into account when calculating the RMP?
What does Goldman's equation take into account when calculating the RMP?
- Only the permeability ratio of K ions
- All electrolytes with their permeability ratios (correct)
- The equilibrium potential of K ion only
- Only the concentration gradient of positive ions
What causes electronegativity inside the membrane according to the text?
What causes electronegativity inside the membrane according to the text?
What is the resting membrane potential (RMP)?
What is the resting membrane potential (RMP)?
What creates an electro-chemical gradient across the cell membrane?
What creates an electro-chemical gradient across the cell membrane?
What provides the basis for cell signaling?
What provides the basis for cell signaling?
Which ions have a higher concentration inside the cell compared to outside?
Which ions have a higher concentration inside the cell compared to outside?
What is the cell membrane highly permeable to?
What is the cell membrane highly permeable to?
Which ion is relatively impermeable to the cell membrane?
Which ion is relatively impermeable to the cell membrane?
What type of force initially causes potassium (K) to move out of the cell?
What type of force initially causes potassium (K) to move out of the cell?
What is generated as potassium (K) leaks out and carries positive electrical charge to the outside of the cell?
What is generated as potassium (K) leaks out and carries positive electrical charge to the outside of the cell?
What is the Nernst potential associated with?
What is the Nernst potential associated with?
What does the Nernst equation help calculate for any univalent ion at normal body temperature?
What does the Nernst equation help calculate for any univalent ion at normal body temperature?
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