Types of Respiration

Respiration is a physiological process that all living things go through. It is a biological process that takes place inside an individual’s cells. Cells need ATP, or adenosine triphosphate, which is produced as a result of the breakdown of glucose, to perform a variety of functions. During respiration, carbon dioxide is expelled in the opposite direction, directly into the ecosystem, while oxygen is moved from the outside environment to the cells within tissues. To break down the C-H bonds in the food that is present in their cells, organisms use oxygen. Respiration is a function of all living things, from simple single-celled species to dominant multicellular ones.  Perfusion and ventilation are used to exchange gases in the lungs.

Types of Respiration

There are two different kinds of respiration:

a.      Aerobic respiration

b.      Anaerobic respiration

Aerobic Respiration

Aerobic respiration is the name given to biological processes that take place in the presence of oxygen. Within the cells of both animals and plants, it is a continuing activity. The oxygen-rich air that we breathe travels through every area of our body and eventually reaches every cell. The food, which contains glucose, is broken down within the cell with the assistance of oxygen into carbon dioxide and water. Energy is released during the breakdown of the bits of food, which are subsequently used by our body.

Anaerobic Respiration

Some species may not always have access to enough oxygen to allow for respiration, yet they still require energy to exist. They engage in anaerobic respiration, or respiration without oxygen, to create the energy they need due to a shortage of oxygen. Lower plants and microbes often engage in anaerobic respiration. Food’s glucose is broken down into alcohol and carbon dioxide while also producing energy in the absence of oxygen.

Classification of Respiration

It is further classified as:

 Alcoholic Fermentation

Alcoholic fermentation is the most well-known fermentation method. Alcoholic fermentation is a complicated biochemical procedure in which yeasts transform carbohydrates into alcohol, carbon dioxide, and other metabolic byproducts that affect the meals’ chemical make-up and sensory qualities. Alcoholic drinks like beer and wine are produced using an alcohol fermentation process. Each pyruvic acid molecule is transformed into lactic acid during this sort of anaerobic respiration.

Pyruvic acid                      Ethyl Alcohol + Carbon dioxide

Lactic acid Fermentation

A severe kind of fermentation that takes place in the skeletal muscles of people and other animals. One of the most popular and simplest techniques for home preservation is lactic acid fermentation, or “Lacto-fermentation.” The fermentation of lactic acid was conducted at 43°C and under various HP conditions.

Pyruvic acid                     Lactic acid

Importance of Fermentation

Food preservation by fermentation has existed for thousands of years. Food can be fermented to add new aromas and textures, increase shelf life, improve some nutrients’ absorption by the body, and create a favorable environment for the development and reproduction of probiotics. Fermented foods have a particular zest and acidity thanks to the alcohol or acids, which also function as a natural preservative. Additionally, fermentation encourages the growth of probiotics or helpful microorganisms. Food nutrients that have undergone fermentation are simpler to digest than those that haven’t. The probiotic bacteria Lactobacillus helveticus and Bifidobacterium longum have been related in a few trials to a decrease in anxiety and depressive symptoms. Foods that have been fermented include both probiotics. The probiotics created during fermentation can aid in reestablishing the proper balance of beneficial bacteria in your stomach and may provide relief from some digestion problems. Initial adverse effects from eating fermented foods might include flatulence and bloat. Always check nutritional information when ingesting items from stores and always follow the instructions when fermenting at home to prevent spoiling.

Mechanism of Respiration

The process of respiration and the exchange of gases make up the respiratory system. The lungs are the major parts of the respiratory system. In addition to the lungs, the nose, trachea, and breathing muscles are respiratory organs. The alveolus’ surface is where the exchange of gases happens. Internal respiration is the term used to describe the gaseous exchange occurring in the tissues. Inspiration and expiration are the two key steps in the breathing system. The process of aerobic respiration never stops. While respiration is a mechanical process of air circulation, respiration is a metabolic process that includes the release of energy. Respiration may be summed up as a gaseous exchange process that releases energy. It is a vital living mechanism that permits someone to carry out actions necessary for survival. Glycolysis and the citric acid cycle are two of the three phases of aerobic cellular respiration.


The process of oxidizing or dividing glucose into pyruvate is known as glycolysis, and it takes place in the cytoplasm. Pyruvate reaches the inner matrix of cell mitochondria in the presence of oxygen and continues to be oxidized in the Krebs cycle.

Krebs Cycle

: This cycle generates two extra molecules of ATP, in addition to CO2, extra protons, and electrons. This produces an electrical gradient that assists in the pumping of hydrogen protons into the inter-membrane gap by the electron transportation chain. The tricarboxylic acid cycle is another name for the Krebs cycle.

Electron transport chain

The mitochondrial inner membrane contains a number of electron carrier protein complexes that make up the electron transport chain. The protein complex ATP synthase uses the high concentration of hydrogen protons in the intermembrane space to transfer protons back into the matrix. This gives ADP the energy it needs to be phosphorylated into ATP.


Respiration is the process of generating energy through the oxidation of intricate organic materials to power various biological activities. There are two different ways of respiration. This type of oxygen is present during aerobic respiration. The breakdown of glucose produces carbon dioxide and water. The breakdown of glucose into ethyl alcohol, carbon dioxide, and energy occurs during anaerobic respiration. Anaerobic respiration may be divided into two primary categories: lactic acid and alcoholic fermentation. In prokaryotic cells, respiration takes place along the plasma membrane and in the cytoplasm. The mitochondria, commonly known as the cell’s powerplant, are where respiration occurs in eukaryotic cells. Bacteria, yeast, and other microbes receive the required energy for their biological functions through the process of fermentation, which is a series of chemical reactions or a metabolic process. Alcoholic drinks, yogurt, and other food items are produced via this anaerobic pathway.

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