Active Transport And Passive Transport

Active transport is the movement of molecules across a membrane from a region of lower concentration to a region of higher concentration against the concentration gradient, often assisted by enzymes and requires energy”. During this process, a protein pump makes use of stored energy in the form of ATP, to move molecules

Active and passive transport are the two main biological processes that play a crucial role in supplying nutrients, oxygen, water, and other essential molecules to the cells along with the elimination of waste products. In essence, Both processes are works for the same purposes, but with different movement.

Active TransportExamples of Active-Transport

  • Phagocytosis of bacteria by Macrophages.
  • Movement of Ca2+ ions out of cardiac muscle cells.
  • Transportation of amino acids across the intestinal lining in the human gut.
  • Secretion of proteins like enzymes, peptide hormones, and antibodies from different cells.
  • Functioning of the White Blood Cells by protecting our body by attacking diseases causing microbes and other foreign invaders.

Difference Between Active And Passive Transport

Active Transport

Passive Transport

Requires cellular energy. Do not require cellular energy.
It circulates from a region of lower concentration to a region of higher concentration It circulates from a region of higher concentration to a region of lower concentration
Required for the transportation of all the molecules such as proteins, large cells, complex sugars, ions, etc. Required for the transportation of all soluble molecules, including oxygen, water, carbon dioxide, lipids, sex hormones, etc.
It transports various molecules in the cell. It is involved in the maintenance of the equilibrium level inside the cell.
It is a dynamic process. Passive Transport is a physical process.
It is highly selective. It is partly non-selective
This is a rapid process. Passive transport is a comparatively slow process.
Transpires in one direction. Transpires bidirectionally.
Active transportation is influenced by temperature. Passive transportation is not influenced by temperature.
In-active transport, carrier proteins are required In passive transport, carrier proteins are not required
This process reduces or halts as the oxygen content level is reduced. This process is not affected by the level of oxygen content.
Metabolic inhibitors can influence and stop active transport. Passive transportation is not influenced by metabolic inhibitors.
Exocytosis, endocytosis, sodium-potassium pump are the types of Active Transport Different types of Passive Transport are – Osmosis, diffusion, and facilitated diffusion

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