0
What happen to action potential if NA plus concentration increases?
Wiki User
∙ 13y ago
I don't think there is a very large effect unless your plasma sodium concentration is seriously out of whack. Changes in plasma calcium or potassium concentrations can affect action potentials a lot more than changes in sodium. I guess theoretically increased sodium intake will tend to depolarize everything.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoThe influx of sodium causes a depolarization from -70 mV to -50 mV, causing a gradeded depolarization to pass the threshold and fire an action potential. Hence, more Na channels open and the AP countinues along the cell or tissue.
Add your answer:
Earn +20 pts
What is a reflax action?
A reflex action is an "automatic" and sometimes involuntary action caused by the presence of a stimulus.The action requires no conscious thought and will happen naturally.An example is someone waving ther hand very close to your face, you will naturally blink.This is a reflex action.
What happen to the speed of moving object when it is pushed in the direction of motion?
When a moving object is pushed in the direction of its motion the speed of the object increases
What is needed to make any action happen?
In science a force is needed....in everyday life a force and usually a motive
A higher concentration of molecules causes a faster chemical reaction This is known as?
This is known as chemical equilibrium. All of the chemicals will want to become stable and this can only happen with equilibrium.
What would happen if you put an egg in water for a day?
An egg is a cell, and so water would move from the container of water to inside the egg by a process called osmosis. This is because osmosis involves the movement of water from a high water potential to low water potential until equilibrium is achieved.
What will happen to the potential and kinetic energy as the ball falls?
Gravitational potential energy increases; kinetic energy increases.
Is an action potential is a phenomenon that either happens completely or doesn't happen at all?
The action potential is an all-or-none phenomenon.
What happen when an acid dissolves?
It increases the concentration of OH- in solution. (apex)
What happen to the potential energy if its height increases?
increase is m*g*h (joules)
What can happen to soil if the hydrogen ion concentration increases?
When there is an increase in hydrogen ion concentration, the soil becomes acidic. Too much acidity in the soil can kill plants.
What happen to barrier potential when temperature increases?
barrier potential P0=(kT/q)*ln(Na*Nd/Ni^2) when T ↑, P0↑.
What will happen to a person's resting membrane potential if they take potassium enhanced intravenous solution?
A potassium enhanced intravenous solution would increase the concentration of potassium ions in the brain. Since potassium ions are positively charged, they depolarize the resting membrane potential. For example, a resting membrane potential of -65 millivolts would be depolarized to -62 millivolts. An appropriate concentration could lead to a significant depolarization of, say, -60 millivolts, at which point an action potential could be possible.
What would most likely happen to the action potential, if a neuron lost its myelin sheath?
The actional potential would not reach the axon terminals.
What would happen to the resting membrane potential of a neuron if sodium were allowed to travel freely down its concentration gradient?
The cell will depolarise
According to the all or none principle what would happen if a cell were depolarized twice the normal amount needed to produce an action potential?
The strength of the an action potential would increase. This would happen because it would need twice as much energy before being produced.
What would happen if the re-uptake of a stimulatory neurotransmitter was blocked?
The action of the excitatory neurotransmitter will increase, since its concentration in the synapse will rise.
In a cell that contains saltwater and pure water surrounds the cell what is most likely to happen?
The cell is in a hypotonic solution, which mean there is more concentration of salt inside than out. Then osmosis works to equalize the concentrations in both the cell and outside solution. In this case, the pure water would rush into the cell to dilute the salt concentration to match the outside concentration. But if too much water enters the cell, the pressure increases and the cell membrane has the potential to burst.
