Mitochondria

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Mitochondria are known as the power houses of the cell. In sexual reproduction only the female gamete has mitochondria. This is because the male gamete which is the sperm uses up all it's mitochondria in swimming up to eggs. Mitochondria are an organelle situated in the cell where [[ATP|ATP synthesis]] takes place. They range from 0.5-10 micrometres in diameter.
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Mitochondria(singular- Mitochondrion) are membrane bound organelles, that carry out oxidative phosphorylation, to produce ATP. Moreover, mitochondria produce the majority of ATP used by eukaryotic organisms and are often referred to as the power houses of the cell. Furthermore, due to the fact that mitochondria are the site ATP synthesis, there is often have a linear relationship between the number of mitochondria in a cell and the cells ATP requirements e.g. a muscle cell uses vast amounts of ATP and thus often contains many mitochondria to adhere to this requirement and maintain function. A further point that must be brought to attention is that mitochondria contain there own DNA(circular)  
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=== Structure ===
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Mitochondria:
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*Range from 0.5-1μm in diameter.
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*Contain an inner(folds in) and outer membrane.
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*Contain a cristae(singular crista) - internal compartments formed by the inner membrane folds.
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*Contain a matrix- large overall internal compartment.
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In sexual reproduction only the female gamete(ovum) has mitochondria when the gametes eventually fertilise, this is because the male gamete(sperm) draws upon all of its mitohondria for locomotion, to aid its travel to the ovum(egg). Furthermore, mitochondria in relation to the structure of the sperm, is&nbsp;wrapped tightly around the flagellum&nbsp;in the sperm and is fixed in this position,&nbsp;to enable the mitochondira to&nbsp;comply&nbsp;with the sperm's unusually&nbsp;high ATP consumption.<ref>Bruce Alberts (et al)-2007: pg815</ref>
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=== References ===
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<references />

Revision as of 22:13, 18 November 2010

Mitochondria(singular- Mitochondrion) are membrane bound organelles, that carry out oxidative phosphorylation, to produce ATP. Moreover, mitochondria produce the majority of ATP used by eukaryotic organisms and are often referred to as the power houses of the cell. Furthermore, due to the fact that mitochondria are the site ATP synthesis, there is often have a linear relationship between the number of mitochondria in a cell and the cells ATP requirements e.g. a muscle cell uses vast amounts of ATP and thus often contains many mitochondria to adhere to this requirement and maintain function. A further point that must be brought to attention is that mitochondria contain there own DNA(circular)  

Structure

Mitochondria:

 

In sexual reproduction only the female gamete(ovum) has mitochondria when the gametes eventually fertilise, this is because the male gamete(sperm) draws upon all of its mitohondria for locomotion, to aid its travel to the ovum(egg). Furthermore, mitochondria in relation to the structure of the sperm, is wrapped tightly around the flagellum in the sperm and is fixed in this position, to enable the mitochondira to comply with the sperm's unusually high ATP consumption.[1]

References

  1. Bruce Alberts (et al)-2007: pg815
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