Describe the mechanism of respiration. Mechanism And Regulation Of Respiration 2022-12-11

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Respiration is the process by which living organisms produce energy from the nutrients they consume. It involves a series of chemical reactions that convert nutrients into a form that can be used by cells to power their various functions.

The most common type of respiration in animals and humans is aerobic respiration, which requires oxygen. This process occurs in the mitochondria, the powerhouses of the cell.

The first step of aerobic respiration is glycolysis, which breaks down glucose (a simple sugar) into two molecules of pyruvate. This process releases a small amount of energy and produces a molecule called NADH, which will be used later in the process to produce more energy.

The pyruvate is then transported into the mitochondria, where it is further broken down through a process called the citric acid cycle, also known as the Krebs cycle. This process releases even more energy and produces additional NADH molecules.

The final step of aerobic respiration is the electron transport chain, which uses the energy from the NADH molecules to produce ATP (adenosine triphosphate). ATP is the primary energy currency of the cell and is used to power all the cell's functions.

In the absence of oxygen, cells can use anaerobic respiration, which does not require oxygen but is less efficient at producing energy. One example of anaerobic respiration is fermentation, which is used by yeast and some bacteria to produce energy.

Overall, respiration is a vital process that allows living organisms to produce the energy they need to survive and thrive. It is a complex process that involves multiple steps and relies on the efficient functioning of various cellular structures and chemical reactions.

Mechanism of breathing and its neural regulation

describe the mechanism of respiration

Breathing Breathing is the process of taking in air from the atmosphere and then releasing it back out into it. It raises when a person is brisk walking, running or after a heavy exercise; similarly, decreases when a person is calm. The oxygen is then supplied to all the tissues of the body. Organs Organs of the respiratory system, like the nose, lungs, etc. Ans: Respiration that occurs in the presence of oxygen is called aerobic respiration.

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Mechanism of Respiration in Human

describe the mechanism of respiration

In the form of bicarbonates Carbonic acid quickly ionizes to form ions i. What is the Respiratory Mechanism? A lot of students don't get reliable study material and they end up getting confused in concepts explained by other notes and textbooks, this is why students get recommended to get study material from a reliable platform, you can trust Vedantu ad it is the best reliable platform that gives 100% accurate study material and which is prepared by the specialized subject teachers who have years of experience. CO 2 + HHb-NH 2 Hb-NH-COOH About 20-23% of CO 2 are transported in this form. The increase in the intrapulmonary pressure increases the atmospheric pressure, which creates a pressure gradient, allowing the air to flow out of the lungs. Students who want a complete understanding of respiration in fishes can connect with the excerpts of Vedantu who will help you to get guidance from the subject excerpts. Mechanical ventilation is controlled by the phrenic nervewhich signals the diaphragm to contract, this occurs both automatically in response to the body's level of oxygen and CO2--via signals from the hypothalamus--and voluntarily, when an individual consciously focuses on their rate of breathing. Mechanism of Respiration Mechanism of respiration involves the breathing mechanism and exchange of gases.

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human respiratory system

describe the mechanism of respiration

Slowly the fluid leaks from small blood vessels and collects in the alveoli. These bicarbonates are carried through plasma to lungs where they combine with hydrogen ion and form water and carbon dioxide. Almost all oxygen are transported in this form, from lungs to tissue. Fish take water into their mouths by passing it through the gills on each side of their heads. Exchange of gases taking place on the surface of an alveolus. They help in expanding and shrinking or compressing the chest cavity while breathing. Breathing depends upon changes in pressure and volume in the thoracic cavity.

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Describe the mechanism of respiration in man.

describe the mechanism of respiration

The other main parts of this system are the trachea windpipe and bronchi for air passages. Pontine Centers Divided into two: Pneumotaxic Center It is situated in upper Pons. Respiration vs Ventilation Respiration and ventilation are two different things. The lungs can achieve high compliance due to their power of low surface tension and high elasticity. Due to high partial pressure of CO 2 in blood and low CO 2 in lungs, the CO 2 diffuses from the blood into the lungs in order to maintain the equilibrium. At the same time, waste carbon dioxide in the blood is expelled into the water via the gills.

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Describe the mechanism of respiration in humans.

describe the mechanism of respiration

The pressure in this region is normally less than the atmospheric pressure. Now let us study the mechanism of breathing in animals, particularly mammals. Mechanism of breathing and its neural regulation. Our lungs were never taught how to breathe. Some fibres are angled obliquely from downward to the upward layer of ribs that help in contracting and relaxing the rib cage while breathing. It involves following events: The internal intercostal muscle contracts and external intercostal muscles relax. Internal respiration here, takes place through a different reaction where glucose is only partly broken down into alcohol fermentation or lactic acid.

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Mechanism of Respiration

describe the mechanism of respiration

Fig: Mechanism of Breathing Inspiration Inspiration is the process through which air enters the nostrils and reaches the lungs. It's very important to know the type of questions that can be asked as it gives an idea about how the questions are framed and what should be the pattern to answer the difficult questions. Type Breathing is voluntary as well as an involuntary physical process. Hb 4 + 4O 2 Hb 4O 8 Oxyhemoglobin compound is highly unstable compound and thus can dissociate quickly as it reaches to tissue. Function : It controls medullary respiratory centers, particularly the inspiratory center through apneustic center.

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Mechanism of Breathing: Definition, Inspiration, Expiration

describe the mechanism of respiration

This is the reason why pleural pressure is termed as negative pressure. Contraction of the diaphragm and the external intercostal causes inspiration, and relaxation of these muscles causes expiration. Exchange of Gases Oxyhaemoglobin is one of the chemical components formed during the transportation of oxygen. Water present in plasma has poor solubility for oxygen, so it carries only 3% of total oxygen. Respiratory Gas Transport After the gases have scattered in the lungs, causing the blood to become oxygenated, leaving carbon dioxide, the next phase of transportation of oxygen-rich blood to the tissues takes place. What is better- breathing through the chest or the stomach? The oxygenated air present outside the body being at high-pressure flow rapidly into the lungs. Transportation Through RBC Almost 97% of oxygen is transported through RBCs.

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Mechanism of Respiration: Know How Human Beings Respire

describe the mechanism of respiration

A small amount of energy is released alongside carbon dioxide. Bicarbonate ions combine with sodium and potassium to form sodium bicarbonate and potassium bicarbonate. Energy is produced and released in the form of ATP during respiration. It occurs in lungs. The basic 3 components of external respiration are surface area of alveolar membrane, partial pressure gradient of gases, and ventilation and perfusion matching.

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Explain the Mechanism of Respiration?

describe the mechanism of respiration

Action : They are very sensitive to an increase in hydrogen ion concentration. But as the solubility of oxygen is less in water only around 3% of oxygen is transported through plasma. This is carried out through various respiratory organs. Factors that increase dissociation include low O 2 levels, low pH and raised temperature. Breathing is one of the most important characteristics of all living organisms. The lung movement is governed by the pressure gradient, the transpulmonary pressure, which exists between the pleura and the lungs. If the opposite happens, the air rushes in.

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