Endoplasmic reticulum, Biology

ENDOPLASMIC RETICULUM

It is also known as Endoskeleton of the cell, Endomembranous system of the cell.

Garnier (1897) first observed them and called Ergastoplasm.

E.R. name proposed by Porter (1961).

E.R. present in all eukaryotic cells.

E.R. is a diffused cell organelle.

E.R. consists of three structure :-

(1) Cisternae - Long flattened and unbranched units arranged in stacks. 40-50 nm thick.

(2) Vesicles - 25-500 nm in diameter.

(3) Tubules - Long, isolated, branched units. 50-190 nm thick

Structure of E.R. is like the golgi body but in E.R. cisternae, vesicles and tubules are isolated in cytoplasm and these do not form complex.

Golgi body is localised cell organelle while E.R. is widespread in cytoplasm.

1080_endoplasmic reticulum.png

Posted Date: 10/5/2012 7:16:11 AM | Location : United States







Related Discussions:- Endoplasmic reticulum, Assignment Help, Ask Question on Endoplasmic reticulum, Get Answer, Expert's Help, Endoplasmic reticulum Discussions

Write discussion on Endoplasmic reticulum
Your posts are moderated
Related Questions

Does every amino acid have a central carbon? To which organic group is that central carbon bound? A carboxyl group -COOH, an amine group - NH 2 , an atom of hydrogen -H and a v

Coding sequence is the portion of the gene or the mRNA which actually codes for a protein. Introns are not coding for the sequences; nor are the 5' or 3' untranslated regions (or

functions of iron in the body: Iron is the major component in haemoglobin. It helps to carryout oxygen from lungs to the tissues. About 60 to 70% of Iron in the body i

Q. What is Hansen's disease (etiological agent, mode of transmission, clinical manifestations and prevention)? The etiological agent of the Hansen's disease is bacteria called

How plants control the opening and the closing of the stomata? The closing and the opening of the stomata depend upon the necessity of the plant to lose water and heat through

After stinging its victim, the honeybee leaves behind the barbed stinger, poison sac, and muscles that continue to pump venom into the wound. A study compared two methods of removi

Explain some Features of Aspergillus? The identifying features include: 1. Macroscopically Aspergillus colonies are powdery and are of different colours like green, blue, bl

In which type of animals does the placenta exist? What is its main function? True placenta is present in placental mammals. The placenta is produced from the chorion of the

Staphylococcal food poisoning results from consumption of food containing enterotoxin produced by enterotoxigenic strains of Staphylococcus aureus. It is caused by ingestion of imp