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There are many reasons to move things across the plasma membrane. Any molecule that is soluble in water cannot cross the plasma membrane because the inner layer is hydrophobic (repels water). This includes molecules that are critical for cell survival, such as positively charged ions such as sodium and calcium, as well as water and glucose. All of these substances must be passed across passively (without energy expenditure) or actively (with energy expenditure). These processes are generally carried out by specific proteins, which provide a hydrophilic (water loving) path or channel through the membrane.
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What is the name for the movement of water across the plasma membrane?
The movement of water across the plasma membrane is called osmosis. It occurs in response to concentration differences of solutes on either side of the membrane.
How plasma membrane diffuse across plasma membrane?
Ions can't diffuse across membranes, they must used channels to transport across
What is the difference between passive and active transport across the plasma membrane?
Active transport is ATP dependent, whereas passive transport uses only the kinetic energy of the particles for movement across the plasma membrane- mastering A and P homework-
The movement of relatively large particles across a plasma membrane via transport proteins?
... is called "facilitated diffusion".
What is the name for the movement of water access the plasma membrane?
The movement of water across the plasma membrane is called osmosis. Water moves from where it is in higher concentration to where it is in lower concentration. Osmosis is a type of passive transport and does not require any energy expenditure by the cell.
What is the movement of relatively large particles across a plasma membrane via transport proteins called?
Facilitated Diffusionosmosis & diffusion
Does passive or active processes account for the movement of fats and respiratory gases through the plasma membrane?
Passive processes, such as simple diffusion and facilitated diffusion, account for the movement of fats and respiratory gases through the plasma membrane. These processes do not require energy input and rely on the concentration gradient to drive the movement of molecules across the membrane.
What controls movement into and out of cells?
Plasma membrane
What moves marerials across the plasma membrane in the direction of the concentration?
Active transportation is the material that across plasma membrane. This makes it flow one way.
What is the process that utilizes a carrier to move materials across the plasma membrane in the direction of the concentration gradient that does not use ATP?
Active Transport
What is a membrane potential?
a voltage or electrical charge across the plasma membrane
Is it true that Movement of water across the plasma membrane depends on the relative concentration of solutes or dissolved substances?
Yes, the movement of water across the plasma membrane, known as osmosis, depends on the relative concentration of solutes. Water will move from an area of lower solute concentration to an area of higher solute concentration in an attempt to balance the solute concentrations on both sides of the membrane.
