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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.
What else can I help you with?
Does Na plus Na K or K plus have the largest radius?
The neutral atom of potassium has the largest radius.
What pairs is listed in order from smaller radius to larger radius F F- or Na plus Na?
Na+ is smaller than Na.
What hormone regulates Na plus and K plus ion concentration?
aldosterone
What is the formula for Na plus plus S2?
Na2S
What term would refer to Na plus?
sodium
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?
The membrane potential that occurs due to the influx of Na+ through chemically gated channels in the receptive region of a neuron is called the excitatory postsynaptic potential (EPSP). This influx of Na+ leads to depolarization of the neuron, bringing it closer to the threshold for generating an action potential. EPSPs can summate to trigger an action potential if they reach the threshold potential.
Is Na or Na plus bigger?
Na+is bigger
What prevents the Na plus and K plus gradients from dissipating?
Na+-K+ ATPase
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-
Does Na plus Na K or K plus have the largest radius?
The neutral atom of potassium has the largest radius.
H plus Cl- plus Na plus OH- Na plus Cl- plus H2O is?
Hydrochloric acid and sodium hydroxide yield salt and water H+ + Cl- + Na+ + OH- --> Na+ + Cl- + H2OComment:In solutions you better leave unchanged ions ( Cl- and Na+) out of the balanced equation: called to be 'tribune ions' (people on the tribune don't take part in the 'match'):H+ + OH- --> H2O This looks simpler than: H+ + Cl - + Na + + OH- --> Na + + Cl - + H2O
What is the net ionic equation of Na plus plus OH- plus H plus plus Cl- H2O plus Na plus plus Cl-?
The net ionic equation for the given reaction is H+ (aq) + OH- (aq) → H2O (l)
NA plus ions enter cells by?
binding to Na+ carrier proteins
What are the spectator ions in Na plus plus OH- plus CI- H2O plus Na plus plus CI?
In the reaction involving Na⁺, OH⁻, Cl⁻, and H₂O, the spectator ions are Na⁺ and Cl⁻. These ions do not participate in the chemical reaction; they remain unchanged in the solution. The key species that participate in the reaction are OH⁻ and H₂O, which can combine to form water or other products depending on the context.
What pairs is listed in order from smaller radius to larger radius F F- or Na plus Na?
Na+ is smaller than Na.
What is Na plus 1 and H -1?
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