* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Passive Transport – No energy required for these processes to
Survey
Document related concepts
Biochemical switches in the cell cycle wikipedia , lookup
Cell nucleus wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cytoplasmic streaming wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell culture wikipedia , lookup
Signal transduction wikipedia , lookup
Cell growth wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell membrane wikipedia , lookup
Transcript
Objective: Describe how materials move into and out of the cell in the processes of osmosis, diffusion and active transport. Passive Transport – No energy required for these processes to occur. Diffusion: movement of molecules (for instance, salt or sugar) from an area of high concentration of those molecules to an area of low concentration. Osmosis: movement of water to move from an area of higher concentration of solute molecules concentration (example: salty water) to an area of lower solute molecule concentration (example: less salty, or plain water) across a semipermeable membrane. Active Transport - The cell must use energy to either remove the substance from the cell or to bring more of it into the cell. For molecules that are too large to actively transport through the cell membrane, endocytosis and exocytosis are used. Endocytosis: the cell membrane surrounds and encloses molecules outside the cell, then detaches from the cell membrane and is transported into the cell. Exocytosis: vesicles inside the cell merge with the cell membrane and the contents of the vesicles are released outside the cell.