▶Muuqaalka casharka
Faafitaanka: qaybaha dhaqaaqaya
0:00 / 0:00
Soo dejiso:
Muuji qoraalka
All substances, including the cell cytoplasm and substances within it, are made up of particles.
These particles move in random directions and collide all the time.
Concentration is the number of particles in a volume of liquid or gas.
The net movement of particles is down a concentration gradient.
Diffusion is the passive movement of particles of a substance from an area of higher to lower concentration.