What do mitochondria attach to?
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Mitochondria dont' neccessarily attach to something, but they are found inside Cytoplasm.
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They contract. Muscles are made up of overlapping fibers of myosin and actin. The myosin fibers have "heads" that attach on to the actin filaments and pull on them, which slides the fibers along each other.\n\nIt's more complicated than that, but I don't know how much you want to know. The myosin heads require ATP in order to latch onto the actin filaments. Additionally, the bonding sites on the actin are usually hidden, and require calcium ions in order to expose those sites.
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Mitochondria is also know as "power house of the cell".
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In certain apoptotic settings, cytochrome c (cyt c) redistributes from inside the mitochandria to the cytosol leading to the activation of a downstream capsase cascade. These capsases are involved in activation of the death sequence in apoptosis.
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it's located in the cytoplasm
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Adenosine Triphosphate, or ATP as it is commonly known, is the cells currency for providing energy. ATP is made in the mitochondria via respiration (more precisely oxidative phosphorylation). This process involves the addition of a phosphate group to a pre-existing adenosine diphosphate group. The ATP is then transported out of the mitochondria and transported around the cell to where reactions occur that require energy input.At these sites ATP is hydrolysed (water added) to form ADP (ATP +  H20 = ADP + P + Energy). The energy is provided in the form of heat energy which is usually used in catabolic reactions to break bonds.
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History of Mitochondria\nDiscovered by a scientist named Altmann in 1890: called them “bioblasts” •Altmann suggested they might be tiny independent organism within living cells.\nMITOCHONDRIA was then named by scientist Benda.
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Mitochondrial DNA (mtDNA) is DNA that is located in mitochondria. This is in contrast to most DNA of eukaryotic organisms, which is found in the nucleus. It is often stated that 100% of the mtDNA contribution to a zygote is inherited from the mother, although this is controversial and may not be true for all organisms.\n\nUnlike most of the cell, the function of which is defined by nuclear DNA, mitochondria have their own DNA and are assumed to have evolved separately. Human mitochondrial DNA consists of 5-10 rings of DNA and appears to carry 16,568 base pairs with 37 genes (13 proteins, 22 tRNAs and two rRNAs) which are concerned with the production of proteins involved in cellular respiration. \nThe existence of mitochondrial DNA also supports the endosymbiotic theory, which suggests that eukaryotic cells first appeared when a prokaryotic cell was absorbed into another cell without being digested. These two cells are thought to have then entered into a symbiotic relationship, forming the first organelle. The existence of separate mitochondrial DNA suggests that, at one point, mitochondria were separate entities from their current host cells.\n\nMitochondria in mammalian sperm are usually destroyed by the egg cell after fertilization. In 1999 it was reported that paternal sperm mitochondria (containing mtDNA) are marked with ubiquitin to select them for later destruction inside the embryo (Sutovsky et. al. 1999). Some in vitro fertilization techniques, particularly injecting a sperm into an oocyte, may interfere with this. Occasionally this process goes wrong, for example in inter-species hybrids. It has also been reported that mitochondria can occasionally be inherited from the father, e.g. in bananas. However, it has also been proven that about 1-2% of a person's mitochondria can be inherited from the father.\n\nThe fact that mitochondrial DNA is maternally inherited enables researchers to trace uterine lineage far back in time. (Y chromosomal DNA, paternally inherited, is used in an analogous way to trace the agnate lineage.) This is accomplished in humans by sequencing one or more of the hypervariable control regions (HVR1 or HVR2) of the mitochondrial DNA. HVR1 consists of about 440 base pairs. These 440 base pairs are then compared to the control regions of other individuals (either specific people or subjects in a database) to determine maternal lineage. Most often, the comparison is made to the revised. Vilà et al have published studies tracing the matrilineal descent of domestic dogs to wolves. The concept of the Mitochondrial Eve is based on the same type of analysis, attempting to discover the origin of humanity by tracking the lineage back in time.
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In cell biology, a mitochondrion (from Greek mitos thread + khondrion granule) is an organelle found in most eukaryotic cells, including those of plants, animals, fungi, and protists. A few cells, such as the trypanosome protozoan, have a single large mitochondrion, but usually a cell has hundreds or thousands of mitochondria. The exact number of mitochondria depends on the cell's level of metabolic activity: more activity means more mitochondria. Mitochondria can occupy up to 25% of the cell's cytosol.\n\nMitochondria are sometimes described as "cellular power plants", because their primary function is to convert organic materials into energy in the form of ATP via the process of oxidative phosphorylation.
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Mitochondria and cytosol\nIn cellular respiration
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Cytoplasm is the area within the cell inside the plasma membrane (the membrane separate the cell to others) and outside the nucleus (the region contaning genetic materials DNA). Cytoplasm contains many internal organelles (internal structures) that are necessary for cell's functions.\nINternal organelles: Ribosome (needed to make proteins), Golgi complex, lysosomes (digest defective materials in cells, only found in animal cells),Endoplastic Reticulum (2 types: rough with ribosome attached and smooth without ribosome), central vacuole (store H2O, toxins, pigments, waste), Mitochondria (use to make energy for cell, mostly from glucose), chloroplast (needed for photosynthesis in plant cells only),cytoskeleton (connect organelles to each other and membrane, control cell movement, cilia and flagella (cell movements inside an organism).
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Electrons from NADH in the cyoplasm require transport into the mitochondria.  There are 2 general transporters, the malate aspartate shuttle, and the glycerol-3-phosphate shuttle.  The malate aspartate shuttle takes the electrons from cytoplasmic NADH and puts them on mitochondrial NADH electron carriers, all fine and dandy, no energy yield lost.  However, the glycerol-3-phosphate system, places the electrons from cytoplasmic NADH to mitochondrial FADH2, which is slight a loss in energy yield.  I'm not exactly sure about which mechanism is selected and why, if it's 50-50, or random, or whatnot.  But that is why there is decreased ATP yield (2 ATP/NADH vs 1.5 ATP/FADH2)
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Mitochondria:  Power plants\nRibosomes:  Factories (which manufacture things)\nCytoplasm:  hmmm... dunno.  Not citizens, though.
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Cells called osteocytes deposite collagen and release calcium phosphate which eventually hardens into a mineral called hydroxyapatite. This eventually forms a mineralized connetctive tissue which allows your muscles and other organs to attach themselves.
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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.
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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?
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Oh Biology, how do I miss thee!!!!!  Ah that was some good times.  Cytochrome c oxidase is part of the respiration cycle and it accepts electrons.  That about all I can remember but thanks for the points and a trip down memory lane.