Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Active and passive transport are similar in that they both transport ions, using ion channels to move ions across the cell membrane. Active and passive transport are different in that active transportation requires energy, moves molecules against the concentration gradient, and may require an ion pump, while passive transport does not..
Puede ser geométrica (como cuadrados o círculos) u orgánica (como formas naturales o libres). Las formas pueden ser bidimensionales (largo y ancho) (en inglés, shape), usualmente delimitadas por líneas o tridimensionales (largo, ancho y altura).
it is a matter of the law, it is there so the road stays organized and there are less accidents. that is why there are lines on the road, to tell you when you can or cannot pass the car in front of you.
