What is low concentration to high concentration called?
There are numerous situations in living organisms when molecules move across cell membranes from an area of lower concentration toward an area of higher concentration. This is called osmosis, and the tendency to transport the solvent molecules is quantified in terms of osmotic pressure.
What is it called when oxygen moves from high to low concentration?
Dissolved or gaseous substances have to pass through the cell membrane to get into or out of a cell. Diffusion is one of the processes that allows this to happen. Diffusion occurs when particles spread. They move from a region where they are in high concentration to a region where they are in low concentration.
How would a cell move a substance from low concentration to high concentration?
To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells.
What is the relationship between tonicity and osmosis?
“Tonicity is the ability of a solution to affect the fluid volume and pressure in a cell. If a solute cannot pass through a plasma membrane, but remains more concentrated on one side of the membrane than on the other, it causes osmosis.”
What is the process called when oxygen moves from the lungs into the bloodstream?
In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls. Once in the bloodstream, oxygen gets picked up by the hemoglobin in red blood cells.
Why do o2 and CO2 pass through the plasma membrane?
Oxygen and carbon dioxide can diffuse directly through the plasma membrane because they are very small and hydrophobic.
Why do o2 and CO2 pass through the plasma membrane quizlet?
Gases such as oxygen and carbon dioxide can pass through a plasma membrane by simple diffusion, because they are uncharged, nonpolar molecules. The majority of the plasma membrane is made from phospholipids that have hydrophobic heads and hydrophilic tails.
How does tonicity affect the function of the cell?
The tonicity of a solution is related to its effect on the volume of a cell. A hypotonic solution causes a cell to swell, whereas a hypertonic solution causes a cell to shrink. Although it is related to osmolality, tonicity also takes into consideration the ability of the solute to cross the cell membrane.
Where does high and low oxygen concentration occur?
The areas of high oxygen concentration become cathodes and areas of low oxygen concentration become anodic areas. These concentration cells can occur at many locations along a pipeline such as: Ditch lines where the pipe lays on the bottom of a ditch with loose soil around the pipe will allow more oxygen on the top and sides of the pipe.
How are gas molecules transported from high to low concentration?
Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs.
How are oxygen molecules diffused from blood to water?
The concentration of oxygen molecules in water is higher than the concentration of oxygen molecules in gills. As a result, oxygen molecules diffuse from water (high concentration) to blood (low concentration). Similarly, carbon dioxide molecules in the blood diffuse from the blood (high concentration) to water (low concentration).
How is the concentration of oxygen related to corrosion?
Oxygen and concentration cells formed from salts are responsible for up to 90% of corrosion in soils and natural waters. Oxygen concentration cells cause many corrosion problems on pipelines. The areas of high oxygen concentration become cathodes and areas of low oxygen concentration become anodic areas.