Golgi Complex - destroyed by enzymes contained within the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Golgi Complex (also Golgi Apparatus or Golgi Body) The Golgi complex is a stack of 3 to 20 flattened, slightly curved saccules which appear like a stack of pancakes. Vesicles containing molecules from the endoplasmic reticulum arrive at the cis face of the golgi complex. Chemical reactions within the Golgi complex modify the molecules. For example, the carbohydrate chains that were added to glycoproteins within the lumen of the rough endoplasmic reticulum may be modified. Modified proteins are then packaged into vesicles that pinch off from the trans face of the golgi complex. 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
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 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 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....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online