most of the heat in the human body is generated within mitochondria, why should this be?
156168
Thermodynamics states that heat is a "by product" of a chemical reaction.  So when chemical bonds are broken or made they require energy.  And since energy cannot be completely conserved in an open system (ie the cell) it is inevitable that heat will be produced.  Since the mitochondria is the "energy factory" of the cell and most of the chemical bonds are made in the form of ATP it would make sense that most of the heat is generated in the place where chemical bonds are made and broken.  So the direct answer to your question is, the chemical reactions that occur in the mitochondira cause heat to be generated.
527411
I know the answer. The total quantity of ATP in the human body is about 0.1 mole. The energy used by human cells requires the hydrolysis of 200 to 300 moles of ATP daily. This means that each ATP molecule is recycled 2000 to 3000 times during a single day. ATP cannot be stored, hence its consumption must closely follow its synthesis. On a per-hour basis, 1 kilogram of ATP is created, processed and then recycled in the body.
472365
you mean like the fact that it sweats when you are hot to cool the body? it is your body's largest organ, and it sheilds the rest of the body from dirt and disease by providing a barrier between them and germs.
502888
The function is as a power source. Energy in the\nform of chemicals with highly active electrons are\nstored in the mitochondria. Here is an excellent site.\ncellbio.utmb.edu/cellbio/\nmitochondria_1.htm#\npowerhouses\n A fascinating little tidbit is that it is the only\nplace outside the nucleus that contains DNA. Thus its\nname, mitochondrial DNA and it's only passed down\ngenetically thru the mother.
395260
All body processes require energy to run properly. When the body is expending more energy than it is taking in (e.g. when exercising), body cells rely on internally stored energy sources, like complex carbohydrates and fats, for energy. The first source the body turns to is glycogen, which is a complex carbohydrate created by the body. When that source is nearly depleted, the body begins lipolysis, the metabolism of fat for energy. In this process, fats, obtained from fat cells, are broken down into glycerol and fatty acids, which can be used to make energy. The primary by-products of metabolism are carbon dioxide and water; carbon dioxide is expelled through the respiratory system.\n\nFats are also secreted by the sebaceous glands (in the skin).
31668
Mitochondria are cell organelles in the protoplasm, responsible for providing the cell with energy. Due to its function, a mitochondrion is called the 'powerhouse of the cell'.
749741
Actually, there is a lot of evidence that mitochondria may have originated as independent microbes, which somehow became incorporated into animal cells.  Mitochondria contain their own DNA.  Some rare genetic disorders stem from problems within the mitochondrial DNA rather than the DNA in the cell nucleus.  Incidentally, all of your mitrochondrial DNA is inherited from your mother.
523588
Pr0n.\n\n\nSeriously, the heat is generated from the oxidation (burning) of fuel (mostly glucose) within the cells (mitochondria).  Just as oxidation of gasoline creates heat & energy, so does the controlled, catalytic (enzymatic) oxidation of sugar - it's what we live on!!
706797
TRUE\nFirst of all all living cells do not produce energy from glucose only,but also from fats and proteins(during starvation).\nAnd then,most of the energy released is lost as heat energy.The remaining energy is stored as ATP( which is like a 'battery').Just as a battery can be 'plugged on' to different objects to produce light(torch),sound(tape recorder),etc so also the ATP can also be used as and when required to provide energy for locomotion,to produce light(glow worm),electricity(ray fish) etc.
844885
i would think the mitochondria since ldh is essential in converting lactate to pyruvate which primarily accounts for atp synthesis in an anaerobic setting and mitochondria are the atp producers in the cell?
299118
because of all the energy that your muscles use, turns into 25% motion, and 75% heat. our body does that so we can be mammals. cold blooded animals convert 100% into motion, hence, they create no heat. however, we cannot bypass this mechinism because it is necisary for life.
952889
live human is "hot" because of all the 4 processes needed for the body to be alive.\nthe process generate heat as a by product of the reactions occurring .\n\nWhen animals are dead there are no more metabolic reactions to generate the heat so the temperature decreases.
286972
the molecules the cell incorporates must be chemically modified to obtain Energy from them. In the first place a reaction occurs in the cytoplasm and then (for those organisms that perform respiration) inside the mitochondria some other reactions occur. The last ones are called respiration.
943600
Both are created by anerobic metabolism. Usually, it's by a cell that can use oxygen or not, and when it runs out of oxygen then it turns to anerobic metabolism. This often creates byproducts such as lactic acid, carbon dioxide, etc. \n\nFor example, you are excercising for a long time and all of your ATP has been used up. Due to a lack of oxygen, anerobic respiration produces lactic acid...which is the burn you feel when you've been excercising heavily. \n\nThe importance is that they are done without oxygen, AND that they produce energy for when you run low on ATP.
763927
since its for your project i'll try to be as brief as possible and provide as much info.\n\nDifferent parts of the body are at different temperatures. the skin temperature is lower than the liver temperature and the feet and hands may be colder than the abdomen. however 'body-temperature' usually means the temperature deep inside the body. the temperature varies during the day and there is no 'correct' body temperature. variations in the range of 35.8-37.7*C are normal.\n\nInternal heat:\nMany of the chemical reactions in cells release heat. the chief heat organs are the abdominal organs, the brain and contracting muscles.\n\nExternal:\nDirect heat from the sun absorbed by the skin, hot drinks and food also add heat to body.\nEvaporation from the skin and lungs takes place all the time and is a cause of heat loss. to a large extent, the heat lost from the body is balanced by the heat absorbed or produced.\n\ni hope this much is enough for you.
971960
Yeah, more mitochondria for energy and more ribosomes (rough ER) to produce proteins necessary for contraction (actin + myosin).\n\nRegards,\nRyan
25048
It's a natural muscle reaction to build up warmth, because otherwise we'd get colder and colder and die of hyperthermia, and no body is going to let that happen to itself except in extreme conditions like being lost in a snowstorm when even shivering isn't enough to save itself, no matter how hard it tries.