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What is Specific defence mechanism
Specific: These relate to specialized cells located throughout the body which respond to invasion of foreign materials/microorganisms such as bacteria, virus, fungi or unwanted substances produced or entering the body. Some specific cells are fixed in tissues such as thymus, lymph nodes, bone marrow, spleen, lymphoid tissue of the respiratory, gastrointestinal and genitourinary tract, kupffer cells of the liver and Peyer's patches of the small intestine.
SHORT COMING OF CELL THEORY / EXCEPTIONS OF CELL THEORY (i) Viruses can be considered as exception to cell theory. They are made of proteins and ones of nucleic acid i.e.
Any significant variation in the internal temperature could have damaging effects on the body's enzymes. Homeotherms or warm-blooded animals including human can however generate co
How the artificial sweeteners are available as sugar substitute? Some of these are available as tablets, as sugar substitute and others appear as ingredients in many food produ
expanciate the process of oxygen and carbon dioxide exchange in sponges
Define about Calcium and Osteoporosis? Gain in bone mass occurs throughout childhood; however, during adolescent growth spurt, the gain in bone mass, as well as, calcium retent
Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction of the net electric force on the 1.40 µC charge.
Explain Night Blindness - micronutrient deficiencies? Night blindness is the earliest symptom of Vitamin 'A' deficiency. The reduction in the supply of vitamin A aldehyde i.e.
What is gluconeogenesis There is accumulation of lactate, which is released into the blood and taken up by the liver where it is converted to glucose by the process called
Indications for Surgery : Patients usually present with fatigue, dyspnoea and ventricular arrhythmias. If they have additional tricuspid regurgitation, pulmonary valve replacement
Using examples of invertebrate nervous systems how can the process of evolutionary cephalization be described? Considering the instance of invertebrates it is observed that ev
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