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What is a protein moves molecules across a membrane?
Facilitated diffusion moves molecules through cell membranes passively.
What is the transport that moves a solute down the concentration gradient?
Simple diffusion
What gas moves into or out of cell diffusion?
Oxygen and carbon dioxide move into and out of cells through diffusion. Oxygen diffuses into cells to be used in cellular respiration, while carbon dioxide diffuses out of cells as a waste product of this process.
What is the net movement of gases into anf out of a leaf during daytime?
During the daytime, there is a net movement of carbon dioxide into the leaf for photosynthesis, while oxygen and water vapor are released as byproducts of photosynthesis and respiration. This exchange of gases is facilitated by small openings on the leaf surface called stomata.
Where does passive diffusion occur in the lungs?
Passive diffusion occurs in the alveoli of the lungs. Oxygen from inhaled air moves across the thin alveolar membrane into the bloodstream, while carbon dioxide moves from the bloodstream into the alveoli to be exhaled.
What is a protein moves molecules across a membrane?
Facilitated diffusion moves molecules through cell membranes passively.
Compare and contrast simple diffusion and osmosis?
osmosis moves through a membrane diffusion moves from higher concentration to lower concentration
What is the transport that moves a solute down the concentration gradient?
Simple diffusion
What moves substances into and out of the cell in facilitated diffusion?
coffee
Where and when does diffusion occur?
Diffusion occurs when there is a concentration gradient i.e. a substance moves from higher to lower concentration.
What gas moves into or out of cell diffusion?
Oxygen and carbon dioxide move into and out of cells through diffusion. Oxygen diffuses into cells to be used in cellular respiration, while carbon dioxide diffuses out of cells as a waste product of this process.
How is diffusion used when cells remove carbon dioxide?
Carbon dioxide moves out of the cells from a higher to lower concentration across the cell membrane. Then the CO2 moves through the capillary wall across the diffusion gradient. The diffusion process is repeated at the capillary/alveolar junction.
Name the process by which oxygen moves across the wall of the alveolus?
diffusion
In what ways do molecules move?
it moves by diffusion, osmosis and active transport
What is it called when oxygen moves into a contracting heart muscle cell?
diffusion
What are the passive process that moves substances across membranes?
Diffusion ,osmosis
What type of circulation moves the blood between the kidneys and the heart?
diffusion
