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Explain the Bright Field Microscopes?
Figure illustrates the compound bright field microscope. This is the most commonly used microscope in biology and microbiology courses. It is called so because it forms a dark image against a brighter background. It contains 2 lens systems for magnification: ocular lens in eyepiece and the objective lens located in nosepiece.
The specimen is illuminated by a light focused on it by a sub-stage lens called a condenser. With this microscope, specimens are made visible because of the differences in contrast that exist between them and the surrounding medium. Contrast differences arise because cells absorb or scatter light in varying degrees. Live cells, however, are difficult to observe through this microscope due to absence of contrast between specimen and the surrounding medium. It is therefore, used to observe nonviable and stained preparations where contrast is increased and variations in colour between cell structure is evident.
Erythrocytic cycle The cycle that takes place in the body of man who is considered as secondary host is called the erythrocytic cycle. The first stage of the cycle begins
Determine the Food Sources of Fluoride? The major source of fluoride in most diets is water, with foods providing only about 25% of total intake. These include tea and marine f
steps in urine formation and the organs/tissues involve in such process?
What is ventilation A. An increase in the hydrogen ion concentration in the interstitial spaces of the brain stem leads to an increase in the duration of the respiratory cy
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Sutures are also classified by thread diameter: Thread materials range in diameter from 1 to 10 with the higher number corresponding to the thinner, more delicate thread. In
Which of the following leads to the formation of atherosclerosis plaques? -uptake of oxidized LDL particles by macrophase -non specific interactions between LDL particles
Explain Early Diastolic Sound in diastolic ? a) Opening snap (0s) of Rheumatic MS: High frequency sound. Generation of sound: Because of high LA pressure, the superior systolic
Q. What are nerves? Axons extend all through the body inside nerves. Nerves are axon-containing structures presenting many axons and covered by connective tissue. The nerves co
ROLE OF ENZYMES IN METABOLISM Enzymes require a non-protein part for their optimal activity, which may be a coenzyme or a metal ion. This has also been stated earlier that
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