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Q: biology ( Answered,   0 Comments )
Subject: biology
Category: Science > Biology
Asked by: matchette-ga
List Price: $5.00
Posted: 19 Nov 2003 15:06 PST
Expires: 19 Dec 2003 15:06 PST
Question ID: 278364
describe the relationship among ribosomes,ER, the golgi apparatus, and exocytosis
Subject: Re: biology
Answered By: omniscientbeing-ga on 19 Nov 2003 16:06 PST

These are all intracellular organelles or bodies (and a cellular
process) having to do with the cytoplasm. ER is Endoplasmic Reticulum,
which you can think of as a network of internal membranes extending
through the cytoplasm, forming a system of tubular vessicles. There
are two types of ER: smooth ER and rough ER.

Smooth ER doesn't have ribosomes on its outer surface.

Rough ER does have ribosomes on its outer surface.

A ribosome is a nonmembranous granule made of RNA and protein.

The Golgi Apparatus are stacks of flattened, membranous sacs or vesicles. 

Basically, the Golgi apparatus serves to process and package secretions. 

From "Biology" (college text), Villee, Solomon & Davis, p.75:

"As protein is manufactured along the rough ER [the type of ER with
the ribosomes], it is sealed off in little packets of membrane,
forming tiny vesicles.  These vesicles pass through the ER to the
Golgi complex, with which they fuse to form new Golgi complex

Exocytosis is the process whereby "a cell ejects waste products or
specific secretion products such as hormones. A membrance-enclosed
vesicle within the cytoplasm fuses with the cell membrane. " [From
"Biology" (college text), Villee, Solomon & Davis, p.112].

So the Golgi Apparatus and ER are involved directly with exocytosis. 

Here are some links to additional informaiton on this subject:

Google Search strategy:




"Golgi Apparatus":

"endoplasmic reticulum":

"ER golgi ribosome exocytosis":


Additional stratgegy:

Personal knowledge, "Biology" (college text), Villee, Solomon & Davis

Hope this helps!

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