Podcast
Questions and Answers
Which of the following is the main component of cell membranes?
Which of the following is the main component of cell membranes?
- Lipid
- Hydrocarbon chain
- Phosphate group
- Phospholipid bilayer (correct)
What is the capacitance of cell membranes?
What is the capacitance of cell membranes?
- 10-4 Fm-2
- 10-3 Fm-2
- 10-1 Fm-2
- 10-2 Fm-2 (correct)
What is the resting membrane potential of nerve cells?
What is the resting membrane potential of nerve cells?
- -50 to -70 mV
- -70 to -90 mV (correct)
- -90 to -110 mV
- -30 to -50 mV
Which ion is high in the extracellular fluid?
Which ion is high in the extracellular fluid?
Which ion is high in the intercellular fluid?
Which ion is high in the intercellular fluid?
What happens to the cell membrane permeability during an active state?
What happens to the cell membrane permeability during an active state?
What is the peak value of the action potential during an active state?
What is the peak value of the action potential during an active state?
What is the duration of the action potential peak?
What is the duration of the action potential peak?
What is the shape and peak size of the action potential dependent on?
What is the shape and peak size of the action potential dependent on?
What is actively pumped across the membrane during sodium-potassium pumping?
What is actively pumped across the membrane during sodium-potassium pumping?
Which process consumes energy and takes about 50ms to restore the resting Na+ and K+ concentrations?
Which process consumes energy and takes about 50ms to restore the resting Na+ and K+ concentrations?
What is the critical threshold value for the response of an axon to a stimulus?
What is the critical threshold value for the response of an axon to a stimulus?
What is the name given to the analog network of resistors and capacitors in the axon?
What is the name given to the analog network of resistors and capacitors in the axon?
What happens to the changes in potential difference across the capacitors as one goes farther from the stimulus?
What happens to the changes in potential difference across the capacitors as one goes farther from the stimulus?
What is the potential difference reached by a stimulus above the threshold level?
What is the potential difference reached by a stimulus above the threshold level?
What is the signal conduction velocity directly proportional to?
What is the signal conduction velocity directly proportional to?
What is the signal conduction velocity inversely proportional to?
What is the signal conduction velocity inversely proportional to?
What is the name of the process that gradually changes the potential difference across the capacitors?
What is the name of the process that gradually changes the potential difference across the capacitors?
What is the name of the current pulse associated with an active potential that travels the length of the axon without attenuation?
What is the name of the current pulse associated with an active potential that travels the length of the axon without attenuation?
What is the name of the process that gradually reestablishes the resting Na+ and K+ concentrations?
What is the name of the process that gradually reestablishes the resting Na+ and K+ concentrations?
