Resultado de búsqueda
Pasos de la respiración celular. Antes de adentrarte en los detalles esenciales, obtén una visión general de la respiración celular. Aprende acerca de las diferentes etapas de este proceso y cómo encajan entre sí. Introducción a la respiración celular. Pasos de la respiración celular. Glucólisis.
- Glucólisis
Glucólisis - Respiración celular | Lecciones de biología |...
- El ciclo de Krebs
El ciclo de Krebs - Respiración celular | Lecciones de...
- El Ciclo del Ácido Cítrico
El Ciclo del Ácido Cítrico - Respiración celular | Lecciones...
- Introducción a La Respiración Celular Y Las Reacciones Redox Abre UN Modal
Introducción a La Respiración Celular Y Las Reacciones Redox...
- Glucólisis
La respiración celular es una ruta metabólica que rompe la glucosa y produce ATP. Las etapas de la respiración celular incluyen la glucólsis, oxidación del piruvato, el ciclo del ácido cítrico o ciclo de Krebs, y la fosforilación oxidativa.
- Overview
- Role of mitochondria
- Main metabolic processes
- Glycolysis
- Tricarboxylic acid cycle
- Oxidative phosphorylation
cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water. Organisms that do not depend on oxygen degrade foodstuffs in a process called fermentation. (For longer treatment...
One objective of the degradation of foodstuffs is to convert the energy contained in chemical bonds into the energy-rich compound adenosine triphosphate (ATP), which captures the chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes. In eukaryotic cells (that is, any cells or organisms that p...
Biologists differ somewhat with respect to the names, descriptions, and the number of stages of cellular respiration. The overall process, however, can be distilled into three main metabolic stages or steps: glycolysis, the tricarboxylic acid cycle (TCA cycle), and oxidative phosphorylation (respiratory-chain phosphorylation).
Glycolysis (which is also known as the glycolytic pathway or the Embden-Meyerhof-Parnas pathway) is a sequence of 10 chemical reactions taking place in most cells that breaks down a glucose molecule into two pyruvate (pyruvic acid) molecules. Energy released during the breakdown of glucose and other organic fuel molecules from carbohydrates, fats, ...
The TCA cycle (which is also known as the Krebs, or citric acid, cycle) plays a central role in the breakdown, or catabolism, of organic fuel molecules. The cycle is made up of eight steps catalyzed by eight different enzymes that produce energy at several different stages. Most of the energy obtained from the TCA cycle, however, is captured by the...
In the oxidative phosphorylation stage, each pair of hydrogen atoms removed from NADH and FADH2 provides a pair of electrons that—through the action of a series of iron-containing hemoproteins, the cytochromes—eventually reduces one atom of oxygen to form water. In 1951 it was discovered that the transfer of one pair of electrons to oxygen results in the formation of three molecules of ATP.
Are you a student? Get Britannica Premium for only 24.95 - a 67% discount!
Learn More
Oxidative phosphorylation is the major mechanism by which the large amounts of energy in foodstuffs are conserved and made available to the cell. The series of steps by which electrons flow to oxygen permits a gradual lowering of the energy of the electrons. This part of the oxidative phosphorylation stage is sometimes called the electron transport chain. Some descriptions of cellular respiration that focus on the importance of the electron transport chain have changed the name of the oxidative phosphorylation stage to the electron transport chain.
- The Editors of Encyclopaedia Britannica
La respiración celular o respiración interna es un conjunto de reacciones bioquímicas en las cuales determinados compuestos orgánicos son degradados completamente, por oxidación, hasta convertirse en sustancias inorgánicas, proceso que proporciona energía aprovechable para la célula (principalmente en forma de ATP ). 1 .
La respiración celular es un proceso que sucede dentro de las células de un organismo. Este proceso libera enegía que el organismo puede usar para vivir y crecer. Muchas moléculas alimenticias se descomponen en glucosa, un azúcar simple. La glucosa se usa en la respiración celular. La glucosa y el oxígeno son entradas de la respiración celular.
Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.
Cellular respiration is a process that happens inside an organism’s cells. This process releases energy that can be used by the organism to live and grow. Many food molecules are broken down into glucose, a simple sugar. Glucose is used in cellular respiration. Glucose and oxygen are inputs of cellular respiration.
