From your body's fat stores.
In order to run or even live you need for your body to create energy in the form of ATP (adenosine tri-phosphate) by a process called cell respiration. Glucose is needed in this process. We get our glucose through the foods we eat (glucose=sugar).
After you eat, your body breaks down carbohydrates, fats, and proteins into smaller molecules, primarily glucose. This glucose is then utilized in cellular respiration to produce ATP (adenosine triphosphate), which serves as the primary energy currency of the cell. ATP is synthesized from ADP (adenosine diphosphate) and inorganic phosphate during this process, allowing cells to store and use energy efficiently.
This one reason why we need to eat. The cells use a simple sugar called glucose to produce a macromolecule: ATP. It requires a large number of steps to get from a hamburger bun to glucose and ATP, but ATP holds the energy that the cell requires from moving muscles to running the nervous system.
Well, they don't exactly 'eat' it. Glucose (sugar used in cells) diffuses into the cells from blood plasma, aided by insulin. Once inside the cell, glucose moves to the mitochondria of the cell where cellular respiration (Krebs cycle) breaks the glucose down by the use of an electron transport chain, and the chemical energy released when the C-H bonds are broken in the glucose to form CO2 and H2O is stored in ATP molecules by a process called active phosporylation. It is a complex cycle, but the summary is: Glucose (C6H12O6) molecules are broken apart to form wastes, CO2 and H2O. The C-H bonds in the glucose are rich in chemical energy, and the purpose of breaking the glucose down is to release that chemical energy and use it to add phosphate ions to AMP (adenosine monophosphate), making first ADP(adenosine diphosphate) and then ATP (adenosine triphosphate). ATP molecules hold the chemical energy in the bonds of the 2 phosphate ions that have been added to them in this process, and the cell can 'spend' that energy for metabolic reactions in the cell by breaking off the two phosphates, releasing that chemical energy into the reactions.
Insulin is released from the pancreatic beta cell due to a symphony of signals. 1st is the increase intracellular level of glucose after we eat. As glucose increases this also increases the intracellular ATP. The increase in ATP closes Potassium channels. This depolarizes the cell. The depolarization opens voltage gated calcium channels and the influx of calcium. Then in a complicated process this causes more calcium to enter the cell from the ER. The huge influx of calcium into the cell cause the insulin containing vesicles to move to the membrane for release of the insulin into the blood stream.
Glucose is the fuel for the cell but it has to broken down first. In the mitochondria, it goes through steps which break it down a bit at a time and this process makes ATP. ATP is the energy coin of the cell which it then spends to do its' work.
In order to run or even live you need for your body to create energy in the form of ATP (adenosine tri-phosphate) by a process called cell respiration. Glucose is needed in this process. We get our glucose through the foods we eat (glucose=sugar).
After you eat, your body breaks down carbohydrates, fats, and proteins into smaller molecules, primarily glucose. This glucose is then utilized in cellular respiration to produce ATP (adenosine triphosphate), which serves as the primary energy currency of the cell. ATP is synthesized from ADP (adenosine diphosphate) and inorganic phosphate during this process, allowing cells to store and use energy efficiently.
ATP and glucose are similar because they are both chemical sources of energy used by cells. They are very different in terms of composition and structure. Glucose is made up of carbon, hydrogen and oxygen only whereas ATP has phosphorus and nitrogen in addition to the aforementioned three elements. Also, glucose is different from ATP in that the glucose does not have an aromatic ring even if it has a six membered cyclic ring.
By the food we eat.
This one reason why we need to eat. The cells use a simple sugar called glucose to produce a macromolecule: ATP. It requires a large number of steps to get from a hamburger bun to glucose and ATP, but ATP holds the energy that the cell requires from moving muscles to running the nervous system.
A glucose molecule can store much more energy than a molecule of ATP. Through cellular respiration, the energy stored in glucose is transferred to ATP molecules. ATP molecules then travel to the locations in the cell that need the energy.
Many cells typically obtain their energy through sunlight or organic molecules which help the cell undergo specific energy pathways which turn these sources into energy in the form of ATP or NADH. (Tried keeping it as simple as I could)
Well, they don't exactly 'eat' it. Glucose (sugar used in cells) diffuses into the cells from blood plasma, aided by insulin. Once inside the cell, glucose moves to the mitochondria of the cell where cellular respiration (Krebs cycle) breaks the glucose down by the use of an electron transport chain, and the chemical energy released when the C-H bonds are broken in the glucose to form CO2 and H2O is stored in ATP molecules by a process called active phosporylation. It is a complex cycle, but the summary is: Glucose (C6H12O6) molecules are broken apart to form wastes, CO2 and H2O. The C-H bonds in the glucose are rich in chemical energy, and the purpose of breaking the glucose down is to release that chemical energy and use it to add phosphate ions to AMP (adenosine monophosphate), making first ADP(adenosine diphosphate) and then ATP (adenosine triphosphate). ATP molecules hold the chemical energy in the bonds of the 2 phosphate ions that have been added to them in this process, and the cell can 'spend' that energy for metabolic reactions in the cell by breaking off the two phosphates, releasing that chemical energy into the reactions.
Insulin is released from the pancreatic beta cell due to a symphony of signals. 1st is the increase intracellular level of glucose after we eat. As glucose increases this also increases the intracellular ATP. The increase in ATP closes Potassium channels. This depolarizes the cell. The depolarization opens voltage gated calcium channels and the influx of calcium. Then in a complicated process this causes more calcium to enter the cell from the ER. The huge influx of calcium into the cell cause the insulin containing vesicles to move to the membrane for release of the insulin into the blood stream.
Kind of. But it does a lot more than burn it. If we just burnt food we would get a big release of energy instantly. Instead mitochondria produce a chemical called ATP which we use for energy. Each molecule of glucose you eat produces 36 molecules of ATP.
Most cells generate ATP and other high-energy compounds by breaking down carbohydrates-especially glucose. The complete reaction sequence can be summarized as follows: glucose+oxygen = carbon dioxide + waterThe breakdown occurs in a series of small steps, several of which release sufficient energy to support the conversion of ADP to ATP. The complete catabolism of one molecule of glucose provides a typical body cell a net gain of 36 molecules of ATP. The total reaction is called cellular respiration.