Lysosomes - to the golgi apparatus for further...

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Lysosomes Lysosomes are membrane-bound vesicles containing hydrolytic (digestive) enzymes produced by the Golgi complex. They fuse with other vesicles formed around material that has entered the cell, allowing the digestion of the vesicle contents. For example, bacteria that are engulfed by white blood cells are destroyed by enzymes contained within the lysosomes. Cells also use lysosomes to kill themselves. This important process occurs during the formation of fingers during embryonic development, the reduction in the size of a tadpole tail as it matures, and the abscission of tree leaves in the autumn. Cellular Secretion Ribosomes attached to the rough endoplasmic reticulum function to produce proteins. Various chemical reactions may occur within the rough endoplasmic reticulum which modify the proteins. Vesicles pinch off of the rough endoplasmic reticulum, carrying the protein molecules
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Unformatted text preview: to the golgi apparatus for further modification. The completed molecules are then packaged into vesicles by the golgi apparatus and move to the plasma membrane where they fuse with the plasma membrane, emptying their contents. Some vesicles such as lysosomes remain within the cell. Peroxisomes Some metabolic processes within cells require the removal of hydrogen (oxidation) from certain molecules. For example, the breakdown of fatty acids often involves the removal of hydrogen. Peroxisomes are vesicles that contain enzymes which remove hydrogen from (oxidize) a variety of different compounds and pass the hydrogen to oxygen, producing hydrogen peroxide (H 2 O 2 ). Hydrogen peroxide is toxic but the enzyme catalase converts it to water and oxygen. 2H 2 O 2 2H 2 O + O 2 Peroxysomes within the liver are involved in detoxifying certain drugs such as alcohol....
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