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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).
Hypospadias Hypospadias is the most common congenital anomaly of the penis. In this uretheral opening is situated on ventral side of the shaft of penis in one or several posi
Determine Food Sources of Zinc? Zinc is normally associated with the protein and/or nucleic acid fraction of foods. Thus, foods high in proteins are good sources of zinc. Lean
Canine parvovirus infections The canine parvovirus infections are caused by a virus, which belongs to the genus Parvovirus in the family Parvoviridae. This virus is similar to
Q. What is the life cycle of the hookworms? The Adult hookworms within the human intestine release eggs that are eliminated with the human feces. Under the adequate conditions
Mrs. M is a 35-year-old Hispanic female with no known past medical history; does not have a primary care provider (PCP). She presents to the emergency department with the following
Is the ventricle lumen larger during systole or during diastole? Systole is the stage of the cardiac cycle on which the ventricles contract. So the lumen of these chambers is d
Q. Is the embryonic development in earthworms indirect or direct? The embryonic development is direct because in earthworms there is no larval stage. Q. What is the name of
What are fossil fuels? Fossil fuels, like oil, gas and coal, form when organic material is preserved from the complete action of decomposers, generally buried deep and under pr
what are the chordata?
WHAT IS THE FUNCTION OF CELL COAT
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