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Why is diffusion also called active transport?
Diffusion and active transport are not the same thing. Diffusion is when molecules pass from an area of high concentration to an area of low concentration. They travel down a concentration gradient. They do this naturally, like if perfume is sprayed at one end of the room, it spreads to the other end, because there is a low concentration of spray at the other end, see? Active transport is when a cell actively moves molecules from one side of its membrane to the other. It is often travelling up a concentration gradient, so it is going from an area of low concentration to an area of high concentration- the opposite of diffusion.
How does a cell each equilibrium?
Molecules tend to travel from a concentration from high to low. A cell will reach equilibrium when the concentration gradient has become equal on both sides of a cell (inner and outer membrane). A cell will reach what is called "dynamic equilibrium" when the concentration gradient of a cell is equal, but molecules still move back and forth in the same proportions.
Molecules travel from areas of higher concentration to lower OR they travel from lower to higher OR do they travel between the equal concentration?
Molecules can travel from low to high or from high to low,until they reach equilibriums. Sincerely,Bart however, they are able to move from low to high using the process called active transport, this however uses energy (*normally in the form of ATP), this is only ever really used in organisms. sincerely Jamie
What influences diffusion?
Diffusion is a type of passive transport. The factors that influence diffusion include: concentration gradient, size of molecule involved, distance the molecule has to travel, temperature, solubility of the molecule and surface area.
What does the hemoglobin in red blood cells release as blood travels through the capillaries?
As red blood cells travel through capillaries oxygen is released (disassociated) with hemoglobin. The oxygen then diffuses down it's concentration gradient into the tissues.
When particles travel from an area of high concentration to an area of what?
When particles travel from an area of high concentration to an area of low concentration, they are moving down their concentration gradient. This process is known as diffusion.
Why is diffusion also called active transport?
Diffusion and active transport are not the same thing. Diffusion is when molecules pass from an area of high concentration to an area of low concentration. They travel down a concentration gradient. They do this naturally, like if perfume is sprayed at one end of the room, it spreads to the other end, because there is a low concentration of spray at the other end, see? Active transport is when a cell actively moves molecules from one side of its membrane to the other. It is often travelling up a concentration gradient, so it is going from an area of low concentration to an area of high concentration- the opposite of diffusion.
When water moves through an area of higher concentration to lower concentration?
This movement is called osmosis. It is a natural process where water molecules pass through a semipermeable membrane from an area of higher water concentration to an area of lower water concentration. Osmosis helps maintain equilibrium in cells by regulating the flow of water and nutrients.
How do molecules travel in passive transport when moving up their concentration gradient?
In passive transport, molecules move up their concentration gradient without using energy. This process relies on the natural movement of molecules from areas of high concentration to areas of low concentration. This movement is driven by the principle of diffusion, where molecules spread out to achieve a balance.
What would happen to the resting membrane potential of a neuron if sodium were allowed to travel freely down its concentration gradient?
The cell will depolarise
How does a cell each equilibrium?
Molecules tend to travel from a concentration from high to low. A cell will reach equilibrium when the concentration gradient has become equal on both sides of a cell (inner and outer membrane). A cell will reach what is called "dynamic equilibrium" when the concentration gradient of a cell is equal, but molecules still move back and forth in the same proportions.
What happens when the concentration of dissolved substances is greater outside the cell than inside?
Water will move out of the cell in an attempt to equalize the concentration of dissolved substances, causing the cell to shrink or shrivel up. This process is known as crenation, and can have negative effects on the cell's functioning.
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.
Molecules travel from areas of higher concentration to lower OR they travel from lower to higher OR do they travel between the equal concentration?
Molecules can travel from low to high or from high to low,until they reach equilibriums. Sincerely,Bart however, they are able to move from low to high using the process called active transport, this however uses energy (*normally in the form of ATP), this is only ever really used in organisms. sincerely Jamie
What influences diffusion?
Diffusion is a type of passive transport. The factors that influence diffusion include: concentration gradient, size of molecule involved, distance the molecule has to travel, temperature, solubility of the molecule and surface area.
Describe the process of active transport?
Active transport is when a protein moves a certain material across the membrane from a region of lower concentration to a region of higher concentration. This means the substance is absorbed against the concentration gradient and energy is needed for this active transport to work. The energy is usually comes from adenosine triphosphate or ATP, every cell supplies its own ATP by cell respiration. Globular proteins or pump proteins or transporter proteins in membranes carry out the active transport, the membrane must contain a lot of these proteins so that the cell can control the contents of its cytoplasm precisely. An example of active transport is in human nerve cells where potassium ions are pumped in and sodium ions are constantly transported out of the cell by active transport into the external fluid bathing the cell to build up a store of potential energy or an electrical impulse that is used to transmit a nerve impulse.
What are the molecules that help substances move through the cell membrane during active transport and facilitated diffusion?
In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient). Oxygen and carbon dioxide and most lipids enter and leave cells by simple diffusion.
