Cells Flashcards
(13 cards)
What is an impermeable membrane?
A membrane that allows nothing to pass through
What is a permeable membrane?
A membrane that allows cells to pass through
What is a selectively permeable membrane?
A membrane that allows some things to pass through, and others to not
What is the function of the cell membrane?
The function of a cell membrane is to allow only certain substances to pass through it and remove waste
What is diffusion?
The movement of particles from an area of higher concentration to an area of lower concentration
What is an example of diffusion?
Air freshener
What is osmosis?
Osmosis is the diffusion of water from an area of higher concentration to an area of lower concentration
What is turgor pressure?
In plants, cells with more water inside of them becomes turgid and press against each other. This causes the stems and leaves to stiffen and stay upright
What is a cell membrane composed of ?
Two layers of fat with proteins scattered at various points
What is turgor pressure?
the pressure exerted on the plants cell wall from the cells contents, the plant will swell and become TURGID
During Diffusion the particles move from an area with (?) concentration to an area with (?) concentration
High to low
what is a concentration gradient ?
a difference in concentration between two areas
What is turgor pressure?
the pressure exerted on the plants cell wall from the cells contents, the plant will swell and become TURGID
