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Membrane permeability refers to the ability of molecules, substances, etc. to pass through the membrane.
For example, the cell membrane is referred to as 'semi-permeable' because it allows some molecules (such as water) to enter, and stops other molecules (such as sodium ions) from passing through the membrane. If these want to get into the cell, they must then rely on proteins in the cell membrane to let them in.
What else can I help you with?
Improper functioning or regulation what might lead to poor regulation of membrane permeability?
It would be helpful to include what the following is so a person will be able to know which might lead to poor regulation. Including this information will enable someone to know the right answer.
Which is true of drugs that decrease membrane permeability to sodium ions?
It would decrease the probability of generating a nerve impulse. When a neuron is activiated by a threshold stimulus, the membrane briefly becomes more permeable to sodium. If the permeability is decreased, it will be more difficult for the sodium ions to rush into the cell.
What factors affect the diffusion of water?
One of the factors that affect the diffusion of water through a membrane by osmosis is the permeability of the membrane. The amount of water on each side of the membrane may also have an effect on water's diffusion. Water will diffuse to the side with little water to even out the concentration.
What happens if the permeability of a resting axon to sodium ion increases?
If the permeability of a resting axon to sodium ion increases, it would lead to depolarization of the neuron. This would cause sodium ions to enter the cell, making the inside more positive and potentially triggering an action potential.
How freely water moves into and through soil or rock is called?
permeability
What feature of a membrane describes whether molecules can cross the membrane?
permeabiity
What is the ability of a cell membrane to allow material to pass through it called?
permeability
Which of the following factors does not affect membrane permeability?
The presence of membrane proteins does not directly affect membrane permeability. Membrane proteins mainly play a role in transport, signaling, and cell recognition rather than impacting the permeability of the membrane itself.
What are the units used to measure membrane permeability?
The units used to measure membrane permeability are typically expressed in terms of permeability coefficient, which is measured in cm/s or m/s.
What can you conclude the permeability of the egg membrane?
The permeability of the egg membrane can be inferred based on the substances that can pass through it. For instance, if certain molecules or ions are able to cross the membrane easily, the permeability is high. Conversely, if only specific molecules can pass through, the permeability is more restricted.
Which molecule of a membrane describes whether molecules can cross the membrane?
permeability
Which feature of a membrane describes molecules whether can cross the membrane?
permeability
What is cell membrane permeability?
It is the ability of the membrane to allow ions and/or particles to cross.
Does an increase in cholesterol affect membrane permeability?
Yes, an increase in cholesterol can affect membrane permeability by making the cell membrane less fluid and more rigid, which can impact the movement of molecules in and out of the cell.
What are facts about permeability?
Permeability refers to the ability of a material to allow fluids or gases to pass through it. It is influenced by factors such as the size of the pores in the material, the composition of the material, and the pressure applied. Permeability is an important property in various fields such as geology, engineering, and biology.
How does the membrane potential affect the permeability of a neurons cell membrane?
The membrane potential influences the permeability of a neuron's cell membrane by affecting the opening and closing of ion channels. When the membrane potential changes, such as during depolarization, voltage-gated ion channels open, allowing ions like sodium (Na+) to flow into the cell, increasing permeability. Conversely, during hyperpolarization, channels may close, reducing permeability to certain ions. This dynamic alteration of permeability is crucial for generating action potentials and transmitting signals in the nervous system.
What is the permeability of the cell membranes?
A membrane is selectively permeable.
