This link has been bookmarked by 34 people . It was first bookmarked on 27 Mar 2008, by Dean Loberg.
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20 Sep 16
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such as prokaryotes or red blood cells, do not have an ER of any kind.
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Rough ER looks like sheets or disks of bumpy membranes while smooth ER looks more like tubes. Rough ER is called rough because it has ribosomes attached to its surface.
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Smooth ER (SER) acts as a storage organelle.
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23 Oct 15
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Another organelle in the cell is the endoplasmic reticulum (ER). While the function of the nucleus is to act as the cell brain, the ER functions as a manufacturing and packaging system.
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The double membranes of smooth and rough ER form sacs called cisternae. Protein molecules are synthesized and collected in the cisternal space/lumen. When enough proteins have been synthesized, they collect and are pinched off in vesicles.
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Ribosomes are attached to the membrane of the ER, making it “rough.”
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important in the synthesis and packaging of proteins
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protein synthesis starts when mRNA moves from the nucleus to a ribosome on the surface of the RER.
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As the ribosome builds the amino acid chain, the chain is pushed into the cisternal space of the RER. When the proteins are complete, they collect and the RER pinches off a vesicle. That vesicle, a small membrane bubble, can move to the cell membrane or the Golgi apparatus.
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22 Sep 14
ralawamiWorks with goljgi and ribosoms
mRNA / tRNA
Cisternae and lumen
Pinching into vesicles
muscle reuirement for CALCIUM IONS -
14 Sep 14
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Another organelle in the cell is the endoplasmic reticulum (ER)
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the ER functions as a manufacturing and packaging system
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There are two basic types of ER. Both rough ER and smooth ER have the same types of membranes but they have different shapes
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10 Sep 14
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The double membranes of smooth and rough ER form sacs called cisternae.
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Protein molecules are synthesized and collected in the cisternal space/lumen.
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When enough proteins have been synthesized, they collect and are pinched off in vesicles.
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The vesicles often move to the Golgi apparatus for additional protein packaging and distribution.
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10 Oct 13
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the ER functions as a packaging system. It does not work alone. The ER works closely with the Golgi apparatus, ribososmes, RNA, mRNA, and tRNA. It creates a network of membranes found through the whole cell. The ER may also look different from cell to cell, depending on the cell's function.
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There are rough ER and smooth ER. They both have the same types of membranes but they have different shapes and rough ER has ribosomes attached.
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Rough ER looks like sheets of bumpy membranes while smooth ER looks more like tubes. Sometimes the ER looks like a flat balloon.
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Sacs of the ER called cisternae store the complex molecules.
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Smooth ER has its purpose in the cell. It acts as a storage organelle. It is important in the creation and storage of steroids. It also stores ions in solution that the cell may need at a later time.
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Rough ER was mentioned in the section on ribosomes. They are very important in the synthesis and packaging of proteins.
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The ribosomes are attached to the membrane of the ER. As the ribosome builds the amino acid chain, the chain is pushed into the ER. When the protein is complete, the rough ER pinches off a vesicle. That vesicle, a small membrane bubble, can move to the cell membrane or the Golgi apparatus
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21 Jan 13
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05 Mar 12
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04 Mar 12
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29 Feb 12
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Emma Mer
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Trevor BER
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27 Feb 12
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24 Oct 11
Brittany EbelingOrganelles Endoplasmic reticulum
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27 Mar 08
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