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Why can't ions typically travel through the cell membrane?
Ions typically cannot travel through the cell membrane because the membrane is selectively permeable, meaning it only allows certain substances to pass through. The structure of the cell membrane does not easily allow ions to pass through, so they require specific channels or transport proteins to facilitate their movement into or out of the cell.
Ions diffuse across membranes down their what?
Its an active transport and use sodium channel generally _____ Diffusion is itself a pathway of travel across a cell membrane. Diffusion can be "simple diffusion" which is simply an ion moving across the membrane anywhere, or "fascilitated diffusion", where an ion moves across the membrane in a specific channel. Either way, diffusion involves the movement of that ion along its concentration gradient and requires no energy. Active transport is not the same as diffusion. Active transport requires energy.
Rate of diffusion and thickness of membrane?
The rate of diffusion is inversely proportional to the thickness of the membrane. Thinner membranes allow for faster diffusion of molecules across the membrane due to shorter distances to travel. This relationship is described by Fick's Law of Diffusion, which states that the rate of diffusion is directly proportional to the surface area of the membrane and the concentration gradient.
What do water passes through a membrane by?
It's called osmosis. The water will travel across the membrane to equal out concentrations so they are both the same. This is because water is a small molecule, able to move through the membrane.Think of it this way. If there were no membrane then the dissolved substance would diffuse throughout the mixture. If you put a membrane there then the same idea works but this time it is only the water that can move. So the water moves through the membrane until the same concentration of water molecules appear on each side.
Why do dissolved particles on one side of the membrane result in the diffusion of water across the membrane?
Dissolved particles on one side of the membrane results in the diffusion of water across the membrane due to the need to have the same solution concentration on both sides of the membrane. Water will diffuse from a hypotonic solution to a hypertonic solution.
What substance easily travel across the cell membrane glucose molecules water molecules or sodium?
Of the three, water will move easily. The others require help and therefore the use of energy.
What is the tendency of a solvent to travel across a semipermeable membrane into area at higher solute concentration?
The tendency of a solvent to travel across a semipermeable membrane into an area with a higher solute concentration is called osmosis. It occurs in an attempt to equalize the concentration of solute on both sides of the membrane.
Can a certain substance pass across the cell membrane?
Also small molecules.Basically because the cell membrane is amphipathic; a polar head and non-polar tails make up the double layered membrane with non-polar tails sticking inward and polar heads outward. This means that the non-polar middle, the lipid part, does not allow hydrophyllic substances to pass easily through the membrane while non-polar substances can pass through easily. Having to do with charge and solubility.
How has the EU promoted economic cooperation across Europe?
they are now able to trade and travel easily across europe
Why can't ions typically travel through the cell membrane?
Ions typically cannot travel through the cell membrane because the membrane is selectively permeable, meaning it only allows certain substances to pass through. The structure of the cell membrane does not easily allow ions to pass through, so they require specific channels or transport proteins to facilitate their movement into or out of the cell.
What can infrared light travel across?
It can travel across the vacuum of space.
During action potential transmission many ions cross the neuronal membrane at right angles to the membrane what travels along the membrane and acts as the signal?
During action potential transmission, the signal is carried along the neuronal membrane by the movement of ions such as sodium and potassium across the membrane. This movement creates changes in the membrane potential, allowing the signal to travel down the length of the neuron.
What part of the cell acts like a selective filter and determines what goes in and out of the cell?
The plasma membrane is selectively permeable, allowing certain molecules to travel in and out of the cell. The size, PH, and temperature all play a factor in what molecules travel through the membrane or don't.
How does a message. travel across the gap. at a synapse?
it is sent through the neurotransmittersAt the synaptic terminal an electrical impulse will trigger the migration of vesicles containing neurotransmitters toward the presynaptic membrane.
Ions diffuse across membranes down their what?
Its an active transport and use sodium channel generally _____ Diffusion is itself a pathway of travel across a cell membrane. Diffusion can be "simple diffusion" which is simply an ion moving across the membrane anywhere, or "fascilitated diffusion", where an ion moves across the membrane in a specific channel. Either way, diffusion involves the movement of that ion along its concentration gradient and requires no energy. Active transport is not the same as diffusion. Active transport requires energy.
Why was travel difficult across the Sahara desert?
why was travel across the Sahara desert difficult
What substance can sound waves travel through?
Any substance!
