Transport in Plants Class 11 Notes - Chapter 11

Every other living organism needs to transport nutrition across its system and waste materials away from it. Humans have their own specialized transportation system that enables efficient transportation of nutrients to every cell in the body. Similarly, plants have their own specialized system that enables it to distribute water and nutrients throughout its body.

Transport Mechanisms

Transport mechanisms in plants have dedicated functions that aid to disperse water and nutrients across. Following are the various transport mechanisms commonly observed in plants:

  • Simple Diffusion

In this system, the molecules move from a region of higher concentration to a lower concentration. It is a natural process and does not require ATP

  • Facilitated Transport

Here, the system moves molecules from a region of higher concentration to a lower concentration using a carrier, which is usually a protein. It does not use ATP, hence, it is a passive system of transport.

  • Active Transport

This type of system can transfer materials “up” through the concentration gradient (from a lower to a higher concentration) using special enzymes and proteins. This system is termed as “Active” because it requires ATP to function. Furthermore, this system of transport can carry materials uphill.

Transport in Plants Class 11 – Important Questions

  1. Name the factors that affect the rate of diffusion.
  2. Define porins.
  3. What is the difference between osmosis and diffusion?
  4. What is root pressure and how does it help in the movement of water in the plant?
  5. Why do guards cells that are found in the stomata open and close during transpiration?
  6. Define water potential.

 

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