Learning

is

simple

and

fun!

Complete thousands of tasks, learn solutions and improve your grades!

Register now! Browse subjects

Theory:

In plants, diffusion and active transport are used to transfer materials into and out of the cells.
 
shutterstock1760655569 (1).jpg
Active transport and passive transport
Active transport:
The type of transport which utilises energy to pump molecules against a concentration gradient is known as active transport.
Active_Transport_-_Protein_Pumps.png
Active transport: Pumps
 
This transport is carried out by membrane-bound proteins, which use energy to transport the substances across the cell membrane and are often referred to as pumps. These pumps transport the substances from a low concentration to a high concentration and is hence known as uphill transport.
Passive transport:
The type of transport which does not utilises energy to pump molecules along the concentration gradient is known as passive transport.
Types of passive transport:
  • Osmosis
  • Diffusion
  • Facilitated diffusion
 The movement of ions and molecules along the concentration gradient without the application of any external energy.
Diffusion:
shutterstock388835710.jpg
Before and after diffusion
Diffusion is described as the free movement of solid, liquid and gaseous molecules from a higher concentration to a lower concentration without the usage of energy.
As it occurs without the involvement of energy, it is a passive process.
 
The process of diffusion
Reference:
https://upload.wikimedia.org/wikipedia/commons/4/45/Active_Transport_-_Protein_Pumps.png