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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. Are there non viral hepatitides? The Hepatitis is a generic name for inflammation of the liver and there are bacterial hepatitides, for instance, in lepstopirosis, and toxic
Hydrarch - Kinds of Succession When succession takes place in a wet area, that is, succession progresses from hydric to mesic conditions. This can be further subdivided as:
Artificial Inspiration : a. After artificial expiration, the rescue worker should slowly release the pressure on the back of the victim. b. This will cause the chest cavity t
Q. How does the female gamete move from the ovary to the uterus? The female gamete released from the ovary falls into the surrounding abdominal cavity and is collected by the F
Q. Etiological factors involved in short bowel syndrome? The etiological factors involved in this disease are: • Anaemia • Osteoporosis • Stone formation • Decrease
What do alcohol and illicit drugs do to the brain Whether its alcohol, nicotine, prescription painkillers, heroin, or cocaine addictive substances change the brain in fundament
HMP shunt in erythrocytes HMP shunt in erythrocytes is of importance due to the generation of NADPH, which maintains the glutathione (G-SH) in the reduced state by glutathi
What is Active site Active site : The site on the surface of an enzyme to which substrate or substrates bind.
Advantages and Disadvantages: of Organizational Charts Advantages a) Defining the Organizational Relationship Without a,chart, many people might view the organization as
What type of compound is the major metabolic waste of Porifera? Why is it important for the organism to get rid of this compound?
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