How does the Na/K pump work to restore ion distribution in the refractory period? Use a diagram to help explain action potentials and scenarios with different strengths of stimuli.... How does the Na/K pump work to restore ion distribution in the refractory period? Use a diagram to help explain action potentials and scenarios with different strengths of stimuli. Describe how an action potential can move only in one direction. Why is an action potential considered all or nothing? Describe the process a nerve impulse takes to cross the synapse. Use a drawing. How is the reflex arc different from the normal stimulus response pathway? What structures are in place to protect the tissue of the central nervous system? Label a brain, including lobes. Describe the function of the following structures of the brain: Cerebrum, cerebral cortex, corpus callosum, frontal lobe, parietal lobe, occipital lobe, temporal lobe, thalamus, hypothalamus, pituitary gland, midbrain, cerebellum, pons, medulla, brain stem.
Understand the Problem
The question is asking about various aspects of neurobiology, including the function of the sodium-potassium pump during the refractory period, the mechanics of action potentials, nerve impulse transmission across synapses, reflex arcs comparison, and the anatomy and functions of both the brain and its protective structures. This involves a thorough understanding of the physiology of nerve cells and brain structures.
Answer
The Na+/K+ pump restores ion distribution by actively moving 3 Na+ out and 2 K+ into the cell using ATP.
The Na+/K+ pump works by actively transporting 3 Na+ ions out of the cell and 2 K+ ions into the cell, which helps restore ion distribution after an action potential. The pump uses ATP to maintain these gradients, essential for nerve impulse transmission during the refractory period.
Answer for screen readers
The Na+/K+ pump works by actively transporting 3 Na+ ions out of the cell and 2 K+ ions into the cell, which helps restore ion distribution after an action potential. The pump uses ATP to maintain these gradients, essential for nerve impulse transmission during the refractory period.
More Information
The sodium-potassium pump is crucial for resetting the resting membrane potential after action potentials have occurred. It helps maintain the neuron's ability to fire quickly and repeatedly. Because the pump operates continuously using cellular energy, it plays a fundamental role in neuron excitability.
Tips
A common mistake is assuming the Na+/K+ pump is directly involved in generating action potentials; it actually restores ion distributions post-action potential.
Sources
- Physiology, Action Potential - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- 2.16: Sodium-Potassium Pump - Biology LibreTexts - bio.libretexts.org
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