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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).
Q. Etiologic factor of diabetes? The precise etiology of diabetes is not known but multiple factors contribute to the disorder. These are reviewed herewith. Type I Diabetes
Q. What are the Symptoms of dyslipidemia? The main symptom is presence of xanthoma: This is a yellowish swelling, nodule or plaque in the skin resulting from deposits of fat. T
The lithosphere contains all of the hard solid land of the earth crust and the semisolid land underneath the crust. The surface of the lithosphere is very uneven contains high moun
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Explain the Manifestations of Iron Deficiency Anaemia? • Paleness of conjunctiva • Paleness of tongue • Paleness of mucosa of soft palate • Low haemoglobin • Swelling of
Types of Ecosystem Basically ecosystems are of two types : terrestrial and aquatic. If you travel from plains to the mountains in the Himalayas, you notice significant changes
Self Help Group: The first and perhaps the most influential of substance abuse rehabilitation is Self Help Group. The self help programme was founded in 1935 by two men, Dr. B
Hazards of O 2 Therapy Exposure to greater than 60 per cent O 2 , for a period of more than 36 hours, or exposure to 100 per cent 0, for a period of more than 6 hours, res
diagram of dna replication
Tumor Suppressor Genes Tumor suppressor genes or anti-oncogenes generally inhibit cell division in cooperation with proto-oncogenes. The very existence of these genes prevent
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