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Are Excitable cells like neurons are more permeable to sodium than to potassium?
Wiki User
∙ 10y ago
More permeable to K than Na
Wiki User
∙ 10y ago
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Where is potassium reabsorbed and secreted?
The absorption of sodium affects the secretion of potassium by making it more difficult for the potassium to be permeable by blocking the areas it travels through.
Through the membrane of a resting neuron highly permeable to potassium ions its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is?
Slightly permeable to sodium ions.
What changes occur in the neuron?
Neurons undergo depolarization and repolarization when stimulated. The sodium and potassium channels open.
What happens when a neuron is stimulated by another neuron?
The cell membrane becomes more permeable to the sodium potassium ions.
Which type of transport is required for sodium to move outside neurons?
Sodium exist as an ion .So energy of ATP is needed
When is a neurolemma more permeable to potassium than sodium?
during depolarization
When a nerve is activated by a threshold stimulus the membrane becomes more permeable to?
Potassium and Sodium
Where is potassium reabsorbed and secreted?
The absorption of sodium affects the secretion of potassium by making it more difficult for the potassium to be permeable by blocking the areas it travels through.
Through the membrane of a resting neuron highly permeable to potassium ions its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is?
Slightly permeable to sodium ions.
Does the sodium or potassium pump provide energy for neurons but does not affect resting membrane potential?
False
What changes occur in the neuron?
Neurons undergo depolarization and repolarization when stimulated. The sodium and potassium channels open.
What characterizes the sodium-potassium pump?
The sodium-potassium pump is extremely important, especially in your nerve cells (neurons). The pump has 3 binding cites for sodium ions, and 2 binding cites for potassium ions. It uses these binding cites to pump sodium to the outside of a membrane and potassium to the inside. This an example of using ATP (energy) to go against the concentration gradient.
What type of channels that are present within the varicosities of autonomic neurons are absent from the axon terminal of other neurons?
Voltage-gated Sodium ions and Potassium ions channels
What happens when a neuron is stimulated by another neuron?
The cell membrane becomes more permeable to the sodium potassium ions.
Which type of transport is required for sodium to move outside neurons?
Sodium exist as an ion .So energy of ATP is needed
Why is The plasma membrane is much more permeable to K than to Na?
Even when both those atoms are encapsulated with water, potassium is smaller than sodium.
Ions used to establish a resting potential?
Potassium and sodium determine the a cell's resting membrane potential. The equilibrium potential (the voltage where no ion would flow) for sodium is about +60 mV while that for potassium is usually around -80 mV, but because the resting cell membrane is approximately 75 times more permeable to potassium than to sodium, the resting potential is closer the the equilibrium potential of potassium. This is because potassium leak channels are always open while sodium come in through voltage gated or ligand gated channels.
