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How do large polar molecules pass through the membrane?
Large polar molecules pass through the membrane by using specific transport proteins that facilitate their movement across the lipid bilayer.
How do molecules move up a concentration gradient?
Molecules move up a concentration gradient through a process called passive transport. This involves the movement of molecules from an area of low concentration to an area of high concentration, driven by the natural tendency of molecules to spread out and reach equilibrium. This movement can occur through processes such as diffusion or osmosis, where molecules move across a membrane without the need for energy input.
The movement of water upward through two glass slides pressed together demonstrates?
capillary action, which occurs due to the cohesive and adhesive properties of water molecules. As water molecules are attracted to the surface of the glass and to each other, they are able to move against gravity through narrow spaces, such as the gap between the glass slides. This process is responsible for the upward movement of water in plants' vascular systems and in other narrow tubes.
Do hydrophilic molecules pass through membranes?
Yes, hydrophilic molecules can pass through membranes, but they typically require the assistance of transport proteins or channels to facilitate their movement across the lipid bilayer.
What is the mechanism of water movement through the xylem?
Water is pulled upwards through the xylem by transpiration, the process where water evaporates from the leaves creating a negative pressure that draws water molecules up the plant. This cohesion-tension theory relies on the cohesive properties of water molecules and the tension created when water molecules adhere to the walls of the xylem vessels.
How the properties of water molecules contribute to the upward movement of water through a tall tree?
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What is the movement of molecules through a cell membrane requiring energy?
active transport
What is the movement of molecules through a membrane due to the pressure of a liquid on that membrane?
Osmosis.
What are molecules that helps control the movement of a substance through the cell membrane?
Proteins
What is the movement of water molecules through a sectively-permeable cell membrane?
osmosis
What is considered as very important in the movement of molecules through protein channels?
selectivity
Controls movement in and out of the nucleus?
The nuclear pore complex controls the movement of molecules in and out of the nucleus. It acts as a selective barrier, allowing only specific molecules to pass through the nuclear envelope. Signals on molecules regulate their transport through the nuclear pores.
What three things affect movement of molecules in electrophoresis?
The three main factors that affect the movement of molecules in electrophoresis are the strength of the electric field applied, the size and charge of the molecules being separated, and the matrix or medium through which the molecules are moving.
How does salt affect the movement of molecules?
Salt can increase the movement of molecules in water through a process called osmosis. When salt is dissolved in water, it creates a concentration gradient that causes water molecules to move towards the area with higher salt concentration, increasing the overall movement of molecules in the solution.
Which term refers to the movement of water molecules through a selectively permable membrane?
diffusion
The opposition to the movement of charges flowing through a material?
Resistance is the opposition to the movement of charges flowing through a material. It is measured in ohms and varies depending on the material and its properties.
What processes do gas molecules move across the room?
Gas molecules move across the room through a process called diffusion, which is the movement of molecules from areas of higher concentration to areas of lower concentration. This movement occurs due to the random motion of gas molecules.
