Supriya N

Nerve Impulse

Nerve impulse refers to the generation of action membrane potential beyond the cell membrane in response to the stimulus. “Nerve impulse conduction” refers to the propagation of nerve impulse that occurs due to a change in membrane potential beyond the cell membrane. When a nerve impulse or action potential reaches the axon terminal, synaptic transmission …

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Neurons

Neurons are the fundamental components of the nervous system that perform a specific task by receiving, conducting, and transmitting the signal or action potential to the other parts of the body. An electrical signal produced by the neurons is called a Nerve impulse that propagates via continuous and saltatory conduction. The term neuron is sometimes …

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Sclerenchyma Tissue

Sclerenchyma tissue refers to one of the types of ground or simple permanent tissues, which possesses both primary and stiff secondary wall. They exist as rigid woody cell with a compact arrangement. Sclerenchyma tissues aid cell integrity and conduction instead of being a dead cell. During the plant’s secondary, the sclerenchyma cells attain maturity and …

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Motility Test

A motility test refers to the biochemical or microscopic examination of an organism that checks the existence of cellular motility. By performing this test, we could differentiate the two major groups of bacteria, namely motile and non-motile, based on their cellular movement. Few organisms are motile, and some are non-motile. Still, all living organisms tend …

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Spectrophotometer

The spectrophotometer measures the absorption and spectral bandwidth of the given sample. Absorption is the logarithm of transmittance, i.e. Log (T), whereas transmittance is the portion of light moved through the sample. Transmittance refers to the ratio of light incidents on the test sample to the light transmits through the solution, i.e. IO/I. Spectral bandwidth …

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Gluconeogenesis

Gluconeogenesis occurs in a reverse manner of glycolysis, which produces glucose by the precursors like pyruvate, lactate, glucogenic amino acids. It is sometimes called Neoglucogenesis. It is a ubiquitous or universal pathway, which occurs in humans, animals, plants, fungi and other living organisms. Gluconeogenesis has only three irreversible steps opposite the glycolysis pathway, while the …

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Vermicomposting

Vermicomposting is a composting technique, which turns the organic debris into a humus-like product by employing earthworms. “Vermicompost” is the compost produced by the vermicomposting unit. The vermicompost merely refers to the earthworm’s excrement, which provides essential nutrients, aeration, porosity, structure, fertility and water-holding capacity to the soil and plant body. The vermicomposting method requires …

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Bile Solubility Test

The bile solubility test is a biochemical test that distinguishes bile soluble and bile resistant α-haemolytic Streptococci. Streptococcus pneumoniae is the only strain that emulsifies by reacting with the bile solubility reagent, whereas the other α-haemolytic Streptococci do not undergo such reaction. The reason for the dissolution of the Streptococcus pneumoniae is due to the …

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Urease Test

Urease test is an analytical method practised to identify the urease positive and negative organisms based on the production of cytosolic urease enzyme. It distinguishes the Proteus species from the non-lactose fermenting members belonging to the Enterobacteriaceae family. Urease test makes the use of urea base. Conventionally, Stuart formulated urea broth was used to identify …

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Coagulase Test

The coagulase test is an analytical method that demarcates the staphylococci species into coagulase-positive and coagulase-negative species. Coagulase is an enzyme, which can either bound to the cell surface of bacteria as “Bound coagulase” or reside within the extracellular space as “Free coagulase”. Staphylococcus aureus, S. intermedius, S. hyicus are coagulase-positive organisms. Staphylococcus epidermis, S. saprophyticus, …

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