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How is heart contraction triggered?
Heart contraction is independent from neuronal stimulus (although it can be modulated by the autonomous nervous system). In the heart there are pacemaker cells that trigger by themselves the action potentials that start the muscle contraction. These cells are concentrated at two special points of the heart: the sinoatrial node (SA node) situated in the superior portion of the right atrium and the atrioventricular node (AV node) situated near the interatrial septum.
Define the Fluidized Dryers? Fluidization occurs when a flow of fluid upwards through a bed of particles (ranging from fine powders to particulate foods such as diced carrots)
Surgical significance of Inferior alveolar nerve and artery In an excessively resorbed ridge, the mental foramen with its contents of mental nerve and vessels, can be found o
what is micelle
WHAT ARE THE BRANCHES AND CONCEPT OF APPLIED BIOLOGY
Q. What is viscosity? Viscosity is resistance to flow of a liquid. It is a measure of the resistance of a fluid to deformation under shear stress. It is commonly perceived as "
Q. Do protozoans have asexual or sexual reproduction ? In protozoans reproduction is asexual or sexual. The most frequent form of sexual reproduction is binary scissiparity or d
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Listeriosis Listeriosis is an important food-borne zoonosis caused by pathogenic species of Listeria. The disease affects both in man and animals. It is a serious invasive dise
Sickling occurs in deoxyhemoglobin S, but not in oxyhemoglobin S. Oxyhemoglobin has a small hydrophobic \"pocket\" in a ß chain region located in the interior of the protein. In de
Subphylum Trilobitomorpha Subphylum Trilobitomorpha involves the trilobites. All species are extinct and the fossils point out that they were all marine forms belonging to Pal
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