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The electrical potential difference across a cell membrane (the resting potential) is around -65 mV, inside negative.
In nerve cells (neurones) or muscle cells this potential difference is reversed during an action potential. Sodium (Na+) channels open and Na+ ions enter the cell down their concentration gradient. This entry of positive charge depolarises the membrane ie it cancels out the resting pootential and then reverses it, so the potential becomes positive inside and negative outside, giving a potential of about +50mV.
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What occurs in repolarization?
As the axon repolarizes Na+ channels open to bring the cell from a resting state -70mv to -55mv and grater (grater being -55mv through 0mv).
What does Na plus H2O plus H2 equal?
Na+H2o+H2=2 Nhoh
What is coefficients na plus Cl2 - NaCl?
Na cl2
What effect does NA plus have on pH?
Na+ does not affect pH.
What is the formula for Na plus plus S2?
Na2S
What are spectator ions in Na plus plus OH- plus Cl- H2O plus Na plus plus Cl?
Na+ and Cl- are spectator ions.
Which membrane potential occurs because of the influx of Na plus through chemically gated channels in the receptive region of a neuron?
An excitatory postsynaptic potential, a type of graded potential, occurs because of the influx of Na+ through chemically gated channels in the receptive region, or postsynaptic membrane, of a neuron. Graded potentials are generated by chemically gated channels, whereas action potentials are produced by voltage-gated channels.
Is Na or Na plus bigger?
Na+is bigger
What occurs in repolarization?
As the axon repolarizes Na+ channels open to bring the cell from a resting state -70mv to -55mv and grater (grater being -55mv through 0mv).
What prevents the Na plus and K plus gradients from dissipating?
Na+-K+ ATPase
What does Na plus H2O plus H2 equal?
Na+H2o+H2=2 Nhoh
What is the complete ionic equation for NaOHaq plus HCIaq equals H2OI plus NaCIaq?
Na+ plus OH- plus H+ equals H2O plus Na+ plus Cl-
What is coefficients na plus Cl2 - NaCl?
Na cl2
What effect does NA plus have on pH?
Na+ does not affect pH.
What is the formula for Na plus plus S2?
Na2S
Which of the following has the largest radius K plus Na plus Na or K?
Potassium has the largest atomic radius.
Does Na plus Na K or K plus have the largest radius?
The neutral atom of potassium has the largest radius.
