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Define age related changes in Immune mechanisms
The immune competence decreases with age. This affects the cell-mediated and humoral immunity. We will learn about these aspects later in Unit 3. The thymus involutes (roll inwards), there is an increase in T cell auto reactivity and autoantibody titre. This makes the elderly more susceptible to infections. The severity of ageing can be reduced by good nutrition, regular physical exercises and mental tranquility.
Explain the Physiology of Lactation Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some col
A bottle barometer A bottle, partially filled with water, is overturned with its neck under the surface of more water in a saucer. This is the device used as a chicken feeder,
Non-Specific Defence Mechanism The non-specific defence mechanism is implemented for different types of infections. It resists infection in two ways, firstly, by blocking the e
Digital X-Ray, Inc., has introduced a new line of equipment that may revolutionize the medical profession. Because of the new technology involved, potential users of the equipment
State about the carbonaceous and nitrogeneous materials The basic ingredients of these are either animal or human excreta containing microorganisms which decompose carbonaceous
how do you find the contour interval
Ecological Crises: The natural atmosphere which man has inherited from the past, with healthy and fresh air, shielding from excessive radiation of the sun, has been deteriorat
A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t
Explain the Nephrotic Syndrome A type of nephritis (an inflammation of the kidneys) that is characterized by low serum albumin, proteinuria and swelling (oedema). Swelling, wei
Define Pollutants Regulated Under the Clean Water Act? The Federal Water Pollution Control Act (FWPCA) Amendments of 1972 later amended while the Clean Water Act (CWA) organize
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