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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).
LOCOMOTIO N - Displacement of body. Mostly animals show locomotion except porifera, urochordata, corals, obelia thier larva may show locomotion. Its importance is -
define cytoplasm
Enrichment of soil Indirect provision of minerals to grazing livestock includes mineral fertilization of pasture and altering soil pH, however this may not be always feasible
Q. What is the endosymbiotic hypothesis about the origin of mitochondria? And what are the molecular facts that support the hypothesis? And To which other cellular organelles can t
why is cosmozoic theory considered to be true?
Centrifugal Pump: This is available for clinical perfusion from 1976 (Bio Medicus Pump). It is disposable, causes less blood trauma and reduces the risk of massive air embolism.
skeletal system of fish .exoskeleton and endoskeleton
Q. Guidelines for Diabetic Patients for Healthy Coping? Generally, a diabetic patient adapts to day to day stress effectively, as they accept their disease condition with the s
Explain the life cycle of Nitrogen ? Nitrogen cycle: Along with carbon, hydrogen, and oxygen, nitrogen is one of the most common elements that form biological molecules. Nitr
Q. Are nematodes triploblastic or diploblastic animals? Just like platyhelminthes, nematodes are triploblastics that is they present three germ layers (ectoderm, endoderm and m
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