0
Charge separation across the bacterial membrane refers to the establishment of an electrical potential difference across the membrane, with one side becoming more positively charged than the other. This separation of charge is essential for various cellular processes, including nutrient uptake, energy production, and cell signaling in bacteria.
Add your answer:
Earn +20 pts
Why is the sodium-potassium pump called an electrogenic pump?
The sodium-potassium pump is called an electrogenic pump because it generates an electrical gradient across the cell membrane. This pump simultaneously transports three sodium ions out of the cell and two potassium ions into the cell, creating a charge separation that contributes to the membrane potential.
What is the small change in the charge across a neuron's membrane called?
The small change in the charge across a neuron's membrane is known as the action potential. It is a brief electrical impulse that travels along the neuron's membrane, allowing for the transmission of signals between neurons.
How does the membrane generate voltage to create a membrane potential?
The membrane potential is created by the separation of ions across the cell membrane. This separation results in a voltage difference between the inside and outside of the cell, with higher concentrations of sodium ions outside and potassium ions inside. This creates an electrical gradient that generates the membrane potential.
What are the two forces that combine to produce an electrochemical gradient?
The two forces that combine to produce an electrochemical gradient are the concentration gradient, which is the difference in ion concentration across a membrane, and the electrostatic gradient, which is the difference in charge across a membrane. Together, these forces drive the movement of ions across the membrane.
What is a nerve membrane at rest called?
At rest, the nerve membrane is referred to as polarized, meaning there is a difference in electrical charge between the inside and outside of the cell. This difference is maintained by the sodium-potassium pump, which actively transports ions across the cell membrane.
What is a membrane potential?
a voltage or electrical charge across the plasma membrane
Why is the sodium-potassium pump called an electrogenic pump?
The sodium-potassium pump is called an electrogenic pump because it generates an electrical gradient across the cell membrane. This pump simultaneously transports three sodium ions out of the cell and two potassium ions into the cell, creating a charge separation that contributes to the membrane potential.
Why is the difference in charge across the inner mitochondrial membrane important?
to produce ATP
What is the small change in the charge across a neuron's membrane called?
The small change in the charge across a neuron's membrane is known as the action potential. It is a brief electrical impulse that travels along the neuron's membrane, allowing for the transmission of signals between neurons.
How does the membrane generate voltage to create a membrane potential?
The membrane potential is created by the separation of ions across the cell membrane. This separation results in a voltage difference between the inside and outside of the cell, with higher concentrations of sodium ions outside and potassium ions inside. This creates an electrical gradient that generates the membrane potential.
Is it possible to completely separate two solutes in one run by carefully selecting the membrane size?
No, it is not possible to completely separate two solutes in one run by just selecting the membrane size. The separation of solutes through a membrane is influenced by various factors such as solute size, charge, and interactions with the membrane surface. To achieve complete separation, a combination of different techniques such as changing membrane properties, utilizing different solvents or applying external forces may be required.
How does the cell use the charge differences that build up across the inner mitochondrial membrane during cellular respiration?
The charge differences across the inner mitochondrial membrane are used to generate ATP through a process called chemiosmosis. Protons are pumped across the membrane, creating a proton gradient. As protons flow back across the membrane through ATP synthase, ATP is produced. This process is essential for providing energy to the cell.
Which is the correct term for the movement of an electrical charge across a membrane?
The correct term for the movement of an electrical charge across a membrane is "ion transport." This process involves the movement of ions such as sodium, potassium, chloride, and calcium across cell membranes, which is crucial for various physiological functions in living organisms.
What effect does the opening of the potassium channels have on the charge difference across the neuron's membrane?
Opening of potassium channels allows potassium ions to move out of the neuron, leading to hyperpolarization by increasing the negative charge inside the neuron. This action increases the charge difference across the membrane, known as the resting membrane potential, making the neuron less likely to fire an action potential.
Does a dialysis membraneave pores?
Yes, a dialysis membrane has pores that allow for the separation of solutes based on their size and charge. The size of the pores can vary depending on the specific dialysis membrane being used.
What is true of ions and their transport across cell membranes?
Ions are charged particles that can move across cell membranes through protein channels or transporters. The movement of ions across cell membranes is crucial for maintaining cell function, regulating cell volume, transmitting nerve impulses, and other physiological processes. The movement of ions is regulated by electrochemical gradients, membrane potential, and specific transport proteins.
What is the difference in electrical charge across the cell membrane of a resting neuron is called?
This is the definition of "resting potential".
