0
What happens if the permeability of a resting axon to sodium ion increases?
Glindberg09
inward movement of sodium will increase and the membrane will depolarize.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Which is true of drugs that decrease membrane permeability to sodium ions?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
What happens when bromine and sodium combine?
They form Sodium Bromide
What happens to sodium if it loses its outer electron?
it becomes a sodium cation
What happens when you mix sodium hydroxide with phosphoric acid?
Sodium phosphate is obtained.
What happens when sodium bromide is in water?
Sodium Bromide is a stable salt. It will dissolve in water.
What happens when the permeability of a resting axon to sodium ion changes?
Inward movement of sodium ions will increase and the membrane will depolarize
When a stimulus acts on a neuron it decreases the permeability of the stimulated point of its membrane to sodium ions?
False( When a stimulus acts on a neuron, it increases the permeability of the stimulated point of its membrane to sodium ions. )
What affect does lowering extracellular calcium have on the resting membrane potential of a neuron?
Low calcium levels in the extracellular fluid increase the permeability of neuronal membranes to sodium ions, causing a progressive depolarization, which increases the possibility of action potentials. These action potentials may be spontaneously generated, causing contraction of skeletal muscles (tetany).
What happens to salt when temperature increases?
At 801 0C sodium chloride is melted.
What happens to the net concentration of sodium ions during the resting membrane potential?
Once the threshold has been reached the fast sodium channels open and sodium ions rush into the cell.
What happens to the solubility of a sodium nitrate as the temperature increases'?
When the temperature increase the solubility also increase.
Drugs that decrease membrane permeability to sodium are used as what?
Drugs that decrease membrane permeability to sodium are used as local anesthetics. These drugs block the sodium channels and prevent NA+ from entering the cell. NA+ influx is important to dipolarize the membrane.
When the concentration of sodium in the blood increases what happens to aldosterone and renin secretion and what then results?
High Blood Pressure
What happens when Aldosterone increases?
Aldosterone causes sodium to be retained and potassium to be excreted and blood pressure to rise.
Major determinant of the resting potential of all cells is?
Resting membrane potential is determined by K+ concentration gradient and cell's resting permeability to K+, N+, and Cl-.Gated channels control ion permeability. Three types of gated channels are mechanically gated, chemical gated, voltage gated. Threshold voltage varies from one channel type to another.The Goldmann- Hodgkins-Katz Equation predicts membrane potential using multiple ionsThe resting potentialBecause the plasma membrane is highly permeable to potassium ions, the resting potential is fairly close to -90mV, the equilibrium potential for K+Although the electrochemical gradient for sodium ions is very large, the membrane's permeability to these ions is very low. Consequently, Na+ has only a small effect on the normal resting potential, making it just slightly less negative than it would be otherwise.The sodium-potassium exchange pump ejects 3 Na+ ions for every 2 K+ ions that it brings into the cell. It thus serves to stabilize the resting potential when the ratio of Na+ entry to K+ loss through passive channels is 3:2.At the normal resting potential, these passive and active mechanisms are in balance. The resting potential varies widely with the type of cell. A typical neuron has a resting potential of approx -70mV
A sodium channel blocker would increasedecreaseserum sodium levels outside of normal resting nerve cells?
a sodium channel blocker would (increase;decrease) serum sodium levels outside of normal resting nerve cells
What happens when sodium level in body increases?
Your body starts to retain water and you bloat. Hence the term "water weight"
