01:119:101 Lecture Notes - Lecture 32: Pinocytosis, Messenger Rna, Apoptosis
Document Summary
Diffusion: the passive movement of particles from an area of high concentration to low concentration. Osmosis: a passive movement of water molecules through a semi permeable membrane. Water moves from an area of low solute concentration to high solute concentration. Active transport: an active movement where an input of energy is required. Particles move from low concentration to high concentration. Facilitated diffusion: a passive movement of particles from high to low concentration through a protein channel in a cell. Isotonic solution: the same concentration of dissolved substances. Hypertonic solution: higher concentration of solutes outside cell than inside. Plasmolyse: when a cell has shrunk. Hypotonic solution: a cell has more solute inside than outside. Turgid: cell may explode under pressure due to a hypotonic solution. Exocytosis: movement out of a cell. Lysosome: a vesicle that contains destructive/digestive chemicals. Nuclear pore: a large hole in the nucleus to allow messenger rna through.