Endoplasmic reticulum, Biology

Assignment Help:

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


Related Discussions:- Endoplasmic reticulum

What are the nine phyla of the kingdom animalia, Q Which are the beings tha...

Q Which are the beings that form the kingdom Animalia? What are the two big groups into which this kingdom is divided? The kingdom Animalia is the animal kingdom. usually the k

What will happen to membranes, What might happen to membranes if many -OH g...

What might happen to membranes if many -OH groups were added to the tails of phospholipids?

Heparinisation, Heparinisation Blood when allowed to flow out from ...

Heparinisation Blood when allowed to flow out from body to the circuit tubings can get clotted. To prevent this, heparinisation is done. Patient is administered 3 mg

Explain corrective surgery - endodontic surgery, Explain Corrective Surgery...

Explain Corrective Surgery - Endodontic Surgery perforation repair periodontal management (root resection, tooth resection) intentional reimplantation

Explain tooth formula, Explain what is tooth formula? Ans) Formulae of...

Explain what is tooth formula? Ans) Formulae of tooth is (2, 1, 3, 2)

What are age pyramids, What are age pyramids? Age pyramids are graphica...

What are age pyramids? Age pyramids are graphical representations in form of superposed rectangles every representing the number of individuals contained in age ranges into whi

Explain why the plasmid is described as a vector, Humans produce insulin fr...

Humans produce insulin from certain cells in the pancreas.The insulin gene is isolated from a human pancreas cell and then inserted into a plasmid.The DNA responsible for the synth

Basic calculations during the practical work in laboratory, Define Basic Ca...

Define Basic Calculations during the practical work in Laboratory? Some basic mathematical formulas and conversion factors are given herewith to help you in your calculations d

Alkaline phosphatase, Alkaline Phosphatase is an enzyme which catalyzes th...

Alkaline Phosphatase is an enzyme which catalyzes the hydrolysis of the phosphomonoesters of the 5' nucleotides. It is used to dephosphorylate (remove phosphate groups from) the 5

What is the cell theory, Cell theory is a theory that asserts that the cell...

Cell theory is a theory that asserts that the cell is the ingredient unit of the living beings. Before the discovery of the cell, it was not examined that the living beings were

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