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Cellular respiration - Wikipedia, Cellular respiration vs photosynthesis essay

Cellular respiration vs photosynthesis essay

In animals with lungs, physiological respiration involves respiratory cycles of inhaled and exhaled breaths . Inhalation (breathing in) is usually an active movement. The contraction of the diaphragm muscle cause a pressure variation, which is equal to the pressures caused by elastic, resistive and inertial components of the respiratory system . In contrast, exhalation (breathing out) is usually a passive process. Breathing in, brings air into the lungs where the process of gas exchange takes place between the air in the alveoli and the blood in the pulmonary capillaries

The following 13-minute video discusses the role of ATP in the human body. To fast forward to its information on anaerobic respiration, click here (5:33) ; for aerobic respiration, click here (6:45) .

Cellular respiration can be aerobic (meaning "with oxygen") or anaerobic ("without oxygen"). Which route the cells take to create the ATP depends solely on whether or not there is enough oxygen present to undergo aerobic respiration. If there is not enough oxygen present for aerobic respiration, then the organism will resort to using anaerobic respiration or other anaerobic processes such as fermentation.

Photosynthesis is a process in photoautotrophs that converts carbon dioxide into organic compounds in the presence of sunlight. Respiration is the set of metabolic reactions that take in cells of living organisms that convert nutrients like sugar into ATP (adenosine tri phosphate) and waste products.

Cellular respiration, on the other hand, is the process by which living things convert oxygen and glucose to carbon dioxide and water, thereby yielding energy. It does not require the presence of sunlight and is always occurring in living organisms. Cellular respiration takes place in the mitochondria of cells.

This process is necessary if there is no oxygen available to process the sugar into carbon dioxide and water. One cannot form CO2 if there is no O2.... However, the cell cannot just keep stockpiling the Pyruvate that forms during the Glycolysis process. Something has to be done with it. This is where fermentation comes in. In your muscle cells, eventually oxygen will be all used up with too much exercise. Muscle cells will then turn the surplus Pyruvate into lactic acid, thus causing the cells to fatigue.

Anaerobic respiration (both glycolysis and fermentation) takes place in the fluid portion of the cytoplasm whereas the bulk of the energy yield of aerobic respiration takes place in the mitochondria . Anaerobic respiration leaves a lot of energy in the ethanol or lactate molecules that the cell cannot use and must excrete.

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Physiological respiration involves the intake of outside oxygen and its distribution to the tissues of the body. Breathing is a part of physiological respiration and functions to bring oxygen into the lungs and expel carbon dioxide.

Aerobic metabolism is up to 15 times more efficient than anaerobic metabolism (which yields 2 molecules ATP per 1 molecule glucose). However some anaerobic organisms, such as methanogens are able to continue with anaerobic respiration , yielding more ATP by using other inorganic molecules (not oxygen) as final electron acceptors in the electron transport chain. They share the initial pathway of glycolysis but aerobic metabolism continues with the Krebs cycle and oxidative phosphorylation. The post-glycolytic reactions take place in the mitochondria in eukaryotic cells , and in the cytoplasm in prokaryotic cells .

These products are created during aerobic respiration over the course of three steps: glycolysis, the citric acid cycle and oxidative phosphorylation. During glycolysis , glucose molecules are broken down into two smaller pyruvate molecules. In the citric acid cycle , electrons are released and gathered by acceptor molecules. During oxidative phosphorylation , the electrons help make a concentration gradient with hydrogen ions that assist a molecule called ATP synthase in building ATP.

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Aerobic metabolism is up to 15 times more efficient than anaerobic metabolism (which yields 2 molecules ATP per 1 molecule glucose). However some anaerobic organisms, such as methanogens are able to continue with anaerobic respiration , yielding more ATP by using other inorganic molecules (not oxygen) as final electron acceptors in the electron transport chain. They share the initial pathway of glycolysis but aerobic metabolism continues with the Krebs cycle and oxidative phosphorylation. The post-glycolytic reactions take place in the mitochondria in eukaryotic cells , and in the cytoplasm in prokaryotic cells .


Cellular respiration vs photosynthesis essay

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Photosynthesis vs Cellular Respiration - Difference and.

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cellular respiration vs photosynthesis essay
cellular respiration vs photosynthesis essay

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