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The Na+-K+ pump is a vital membrane protein that helps maintain the cell's ion balance by actively transporting sodium ions out of the cell and potassium ions into the cell. This process is essential for nerve impulse transmission, muscle contraction, and overall cellular function. It requires energy in the form of ATP to pump these ions against their concentration gradients.
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What best describes the Na plus and K plus concentrations across a neuron's plasma membrane?
Na+ concentration is higher outside the neuron than inside, while K+ concentration is higher inside the neuron than outside. This concentration gradient is maintained by the Na+/K+ pump, which actively transports Na+ out of the cell and K+ into the cell, contributing to the resting membrane potential of the neuron.
Does the sodium potassium pump ejects two Na from the cell and then transports three K back into the cell in order to stabilize the resting membrane potential?
No, the sodium-potassium pump ejects three Na from the cell and transports two K back into the cell. This process helps maintain the concentration gradients of Na+ and K+ ions across the cell membrane, which is integral in stabilizing the resting membrane potential.
Which membrane protein is responsible for restoring the original concentration of Na plus and K plus?
The sodium-potassium pump, also known as the Na+/K+-ATPase, is responsible for restoring the original concentration of sodium and potassium ions across the cell membrane. This pump actively transports three sodium ions out of the cell in exchange for two potassium ions pumped into the cell, using ATP energy to maintain the concentration gradients.
Which statement is true about the movement of the ions through the Na/K pump?
For each molecule of ATP used, the pump moves three positively charged sodium ions out of the cell.
What regulates the amount of potassium excreted by the kidneys?
The Na/K ATP pump, insulin, catecolamins, the kidney (pH balance) and aldosterone.
What event initiates ATP attachment to the Na plus -K plus pump leading to the pump's phosphorylation?
The binding of Na+ ions to the pump
What sort of ion distributions are established and maintained by Na -K pump activity?
high Na+ concentration in the extracellular fluid; high K+ concentration in the cytoplasm
How does Na-K pump work?
The Na-K pump, or sodium-potassium pump, is an active transport mechanism that moves sodium (Na+) out of and potassium (K+) into cells against their concentration gradients. It uses ATP to power the transport, typically moving three sodium ions out for every two potassium ions brought in. This process helps maintain the electrochemical gradient essential for various cellular functions, including nerve impulse transmission and muscle contraction. By regulating ion concentrations, the Na-K pump is crucial for maintaining cellular homeostasis.
Is the resting membrane potential set by the Donnan effect or Na -K pump?
The resting membrane potential is primarily established by the Na⁺/K⁺ pump and the selective permeability of the membrane to ions, particularly K⁺. The Na⁺/K⁺ pump actively transports three Na⁺ ions out of the cell and two K⁺ ions into the cell, contributing to a negative charge inside the cell. The Donnan effect, which describes the distribution of ions across a membrane due to the presence of impermeant solutes, plays a role in influencing ion concentrations but is not the primary determinant of resting membrane potential. Thus, while both mechanisms are involved in cellular ion balance, the Na⁺/K⁺ pump is the key player in setting the resting membrane potential.
Is the sodium potassium pump a carrier protein?
the carrier protein of Na-k pump is an ion carrier protein and the pump cannot be termed as the carrier protein its a biochemical phenomenon
What is a sodium potassium pump?
sodium-potassium pump, in cellular physiology, a protein that has been identified in many cells that maintains the internal concentration of potassium ions [K+] higher than that in the surrounding medium (blood, body fluid, water) and maintains the internal concentration of sodium ions [Na+] lower than that of the surrounding medium. The pump, which has adenosine-triphosphatase (ATPase) activity, traverses the cell membrane and is activated by external [K+] and internal [Na+]. This enzyme uses metabolic energy to transport (pump) Na+ outward and K+ inward. The resting potential of cells and related bioelectric phenomena such as the action potential depends on the steady-state difference in concentrations of Na+ and K+ maintained by the pump.
Why hyperventilation can be one of the causes of hypernatremia?
Hypernatriemia (excess Na, sodium ions in the blood) is a result of ineffective breathing, depletion of more Na, as the true mechanism for Na-K pump fails
What best describes the Na plus and K plus concentrations across a neuron's plasma membrane?
Na+ concentration is higher outside the neuron than inside, while K+ concentration is higher inside the neuron than outside. This concentration gradient is maintained by the Na+/K+ pump, which actively transports Na+ out of the cell and K+ into the cell, contributing to the resting membrane potential of the neuron.
Does the sodium potassium pump ejects two Na from the cell and then transports three K back into the cell in order to stabilize the resting membrane potential?
No, the sodium-potassium pump ejects three Na from the cell and transports two K back into the cell. This process helps maintain the concentration gradients of Na+ and K+ ions across the cell membrane, which is integral in stabilizing the resting membrane potential.
On which side of the membrane are Na ions realeased from the pump?
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Which membrane protein is responsible for restoring the original concentration of Na plus and K plus?
The sodium-potassium pump, also known as the Na+/K+-ATPase, is responsible for restoring the original concentration of sodium and potassium ions across the cell membrane. This pump actively transports three sodium ions out of the cell in exchange for two potassium ions pumped into the cell, using ATP energy to maintain the concentration gradients.
The sodium-potassium pump transports what?
The sodium-potassium pump transports sodium ions (Na+) out of the cell and potassium ions (K+) into the cell against their concentration gradients, utilizing ATP for energy. This process helps maintain the resting membrane potential and is crucial for proper cell function.
