Flashcards
vocab
Flashcards do conjunto (14)
- 1homeostasisthe stable internal conditions of a living thing
- 2equilibriuma state that exists when the concentration of a substances is the same throughout a space
- 3hypotonicdescribing a solution whose solute concentration is lower than that inside a cell
- 4facilitated diffusiona process in which substances move down their concentration gradient across the cell membrane with the addistance of carrier proteins
- 5endocytosisthe process by which a cell surrounds and engulfs substances
- 6diffusionthe proces by which molecules move from an area of greater concentration to any area of lesser concentration
- 7osmosisthe diffusion of water across a slectivelu permeable membrane
- 8plasmolysisthe shrinking or wilting of a walled cell in hypertonic environment
- 9active transportthe movement aof a substance across a cell membrane against a concentration gradient requires the cell to expend energy
- 10phagocytosisa tyoe of endocytosis in which a cell engulfs large particles or whole cells
- 11concentration gradientconcentration gradiente difference in concentration of a substances across space
- 12contractile vaculesan organelle in protists that expels water
- 13ion channelsmembrane protein that provides a pageway across the cell membrane through which an ion can diffuse
- 14sodium-potassium pumpa carrier protein that actively transports K+ ions into Na+ ions out of cells