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Questions and Answers
What is the typical value for resting membrane potential in nerve fibers?
What is the typical value for resting membrane potential in nerve fibers?
- -90 mV
- -70 mV (correct)
- -30 mV
- -50 mV
What is the main cause of unequal distribution of ions across the cell membrane during rest?
What is the main cause of unequal distribution of ions across the cell membrane during rest?
- Equal distribution of ions across the cell membrane
- Intracellular non-movable positively charged proteins
- Selective membrane permeability to Na+ ions
- Selective membrane permeability to K+ ions (correct)
What is the role of the Na+/K+-ATPase pump in maintaining resting membrane potential?
What is the role of the Na+/K+-ATPase pump in maintaining resting membrane potential?
- It pumps 2 Na+ ions into the cell
- It pumps 3 K+ ions out of the cell
- It pumps 3 Na+ ions into the cell (correct)
- It pumps 2 K+ ions out of the cell
What type of ion channels are stimulated by changes in voltage?
What type of ion channels are stimulated by changes in voltage?
What is the typical value for resting membrane potential in skeletal and cardiac muscle fibers?
What is the typical value for resting membrane potential in skeletal and cardiac muscle fibers?
Explain the role of the Na+/K+-ATPase pump in maintaining the resting membrane potential.
Explain the role of the Na+/K+-ATPase pump in maintaining the resting membrane potential.
How does the unequal distribution of ions across the cell membrane contribute to the resting membrane potential?
How does the unequal distribution of ions across the cell membrane contribute to the resting membrane potential?
What is the significance of the intracellular non-movable negatively charged proteins in maintaining the resting membrane potential?
What is the significance of the intracellular non-movable negatively charged proteins in maintaining the resting membrane potential?
Describe the role of leak channels in the behavior of nerve cell membranes.
Describe the role of leak channels in the behavior of nerve cell membranes.
How do voltage-gated channels contribute to the electrical events in nerves?
How do voltage-gated channels contribute to the electrical events in nerves?
What is the typical value for resting membrane potential in nerve fibers?
What is the typical value for resting membrane potential in nerve fibers?
What is the typical value for resting membrane potential in skeletal and cardiac muscle fibers?
What is the typical value for resting membrane potential in skeletal and cardiac muscle fibers?
What is the main cause of the unequal distribution of ions across the cell membrane during rest?
What is the main cause of the unequal distribution of ions across the cell membrane during rest?
What is the role of the Na+/K+-ATPase pump in maintaining the resting membrane potential?
What is the role of the Na+/K+-ATPase pump in maintaining the resting membrane potential?
How do leak channels and gated channels contribute to the behavior of nerve cell membranes?
How do leak channels and gated channels contribute to the behavior of nerve cell membranes?
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