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Explain the Mechanism of Phagocytosis
In phagocytosis, the organism is entrapped into vacuoles known as "Phagosome". The cytoplasmic granules, organelles or lysosomes fuse with the phagosome releasing powerful microbicidal substance. These substances are divided into:
a) Those which are dependent on O2 mechanism, and
b) Those which are O2 independent mechanisms
Example for O2 dependent mechanism is superoxide anion, singlet O2 hydroxyl free radicals. The O2 independent ones are lysosomes, proteolytic enzymes and several other hydrolytic enzymes.
Long Refractory period - Properties of a Beating Heart Refractory period is the period during which a stimulus fails to evoke a response. In a beating heart, if an external sti
To study a hailstone When it hails, collect some of the hailstones. Cut them in half and view how the ice of the hailstone has been built up in layers. If you live in a region
mode of feeding f a lion
Scientific and Technical Achievements of Bronze Age: The major technical advance that accompanied the rise of cities was the discovery and use of metals, particularly coppe
Dating the Past: Today, that a particular rock is a million ycars old, or a fossil is 50 thousand ycars old. For instance, how do we estimate the duration of various geo
why the water is important in all the people in the world
What is granite? Granite is a solid, igneous rock. It is formed by mica, quartz, feldspar and sometimes bits of other rocks as well. Granite is generally pink, white, or grey..
Specific gravity of a liquid not mixing with water Pour oil into an open glass tube partially immersed in water until it forces water as far as the lower end. The relative leng
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Deductive logic: Deductive logic may be considered as the opposite of induction. Here the reasoning is more direct. If we know a statement about a whole class of objects, ph
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