Endoplasmic reticulum, Biology

Assignment Help:

ENDOPLASMIC RETICULUM (ER)

Eucaryotic celIs have two major compartments- nucleus and cytoplasm. Cytoplasm was known to have no structure until the discovery of electron micrsscope. That cytoplasm is permeated by a membranous network called endoplasmic reticulum (ER), was revealed only after the introduction of electron microscope. Endoplasmic reticulum is a three dimensional network of membrane channels which constitutes more than half of the total membrane of the cell, ER is a highly folded and convoluted structure and forms a single continuous sheet enclosing one continuous sac. The interior of the sac is called "cisternal space" or "ER lumen". This is separated from the cytoplasm also called cytosol by a single membrane which mediates the communication between these two compartments. ER provides the cell with a compartment for storage of substances to be kept separate from cytosol. In addition, it has a key role in the biosynthesis of macromolecules.

ER is a double membranous organelle which consists of interconnecting flattened sacs called cisternae or interconnected tubules or vesicles. Cisternae are temporary storage sites for nutrients (Figure shown below).

 

527_endoplasmic teticulum.jpg


Related Discussions:- Endoplasmic reticulum

What are the types of leukocytes, What are the types of leukocytes and how ...

What are the types of leukocytes and how are they classified into granulocytes and agranulocytes? The types of leukocytes are monocytes, lymphocytes, neutrophils, eosinophils

Phylum protozoa, Make a detailed study on phylum protozoa taking an example...

Make a detailed study on phylum protozoa taking an example with clear labeled diagram

Explain about the commercial sterilization, Explain about the Commercial St...

Explain about the Commercial Sterilization? Sterilization is the most extreme heat treatment given in preservation of food by heat. Usually target organism is a heat resistant

What is the destination of the notochord, Q. What is the destination of the...

Q. What is the destination of the notochord in protochordates and in vertebrates? In vertebrates the notochord disappears and gives birth to the spinal column known as vertebra

Explain about utility gloves, Q. Explain about Utility Gloves? Because ...

Q. Explain about Utility Gloves? Because of the increased risk of percutaneous injury during instrument cleaning (100% of the Faculty incidents reported in academic year 2003/0

Explain the technology of transgenic plant, Explain the technology in which...

Explain the technology in which transgenic plant was constructed in which seeds that will produce plants for a single crop.

Explain sinus venosus defect with partial anomalous venous, Explain Sinus V...

Explain Sinus Venosus Defect with Partial Anomalous Venous Connection ? In this defect the atrial septal defect is situated just below the orifice of superior vena cava above

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd