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How does the potassium ion channel selectively allow potassium ions k to pass through but block sodium ion Na?
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What type of channel does sodium and potassium use to diffuse across the plasma membrane of all cells?
voltage type of channel
What is the symbol for sodium potassium?
Sodium is Na Potassium is K
Which is more reactive sodium or lithium or potassium?
K; Potassium
How do you write sodium and potassium formula?
Sodium: Na Potassium: K ...seriously?
What happens when sodium chloride and potassium sulfate?
Sodium chloride and potassium sulfate will not react.
What form of cellular transportation helps human cells maintain their sodium and potassium concentration?
The sodium/potassium pump, the sodium leak channel and the potassium leak channel.
Sodium and potassium ions both have a positive charge but potassium is larger and there is a protein channel that allows potassium ions through but blocks sodium ions and how is this possible?
These membranes have several types of selective ion channels. Some are nongates and always open, but for the potassium channel is gated, and only opens for the chemical potassium after specific conformational changes.
Why can't Sodium (Na ) potassium (K ) calcium (Ca2 ) chloride (Cl -) pass through the lipidbylayer?
All of those molecules are probably too big to go through the membrane, its selectively permeable
Why Sodium and potassium ion can only cross in axon membrane through protein channel explain why?
At rest sodium in the outside and potassium on the inside as action potential propagate along the axon, depolirization happens and sodium channel opens and allow sodium ions to flood into the neurone. A wave of deporization spread along the neuron, the neuron membrane contain specialised protein called channels. the channel from pore.
What type of channel is responsible for the action potential?
sodium potassium and calcium
What type of channel is responsible for action potential?
Remove this? Has been answered in similar question. Calcium, Potassium, Sodium.
What type of channel does sodium and potassium use to diffuse across the plasma membrane of all cells?
voltage type of channel
What ions are pumped in and out of cell through the sodium potassium pump?
3 sodium ions go out and 2 potassium ions go in
What is the meaning of selectively permable?
Selectively permeable means that only certain objects can pass through. I've encountered that phrase in cell Biology, when talking about cell membranes. The cell membrane is made of phospholipids that only allow certain substances through. Water can pass through because the molecules are small enough to pass through small holes in the membrane. Other molecules, such as sodium or potassium, can be transported using protiens.
What type of transport protein is a sodium potassium pump?
It is a carrier protein
How do sodium and potassium travel into and out of cells?
The sodium potassium pump transports sodium and potassium into and out of the cell. look at this site. it will explain. Source: http://highered.mcgraw-hill.com/olcweb/cgi/pluginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120068/bio03.swf::Sodium-Potassium%20Exchange%20Pump
Do potassium channels open and sodium channels close during repolarization phase of the action potential?
They both stay open.If sodium channels were to remain closed, there wouldn't be any repolarization. The Potassium concentration gradient would keep pumping Potassium ions out of the cell and the Potassium electrical gradient would drive Potassium ions into the cell, thus maintaining the equilibrium potential of -90 mV.No repolarization would occur if the sodium channels are closed.The above is not correct.During the depolarization phase, BOTH VOLTAGE-GATED SODIUM & POTASSIUM channels open.Once the cell reaches close to sodium's equilibrium potential, the VOLTAGE-GATED sodium channel closes.The VOLTAGE-GATED potassium channel opens around this time(The voltage gated potassium channel is very slow to open; it fully opens around the same time the voltage gated sodium channel closes) causing repolarization.The cell experiences hyperpolarization because the voltage gated potassium is also slow to close.Once fully closed, the cell depolarizes back to resting potential.Also, the picture is a picture of the AP in cardiac muscle which differ from skeletal muscle.The plateau is due to voltage-gated calcium channel that opens during the AP.
