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Explain Intermittent positive pressure lung inflation
When medulla is affected, the cough reflex may be lost. To prevent secretions entering the lungs, a tube is inserted into the trachea. This tube is connected to a positive pressure pump which inflates the lungs by blowing air into them. Alternatively, anegative pressure may be incorporated so that the expired air is sucked.
DISPOSAL OF MICROBIAL CULTURES: After the study is finished microbial cultures should not be left in the laboratory or taken out of the laboratory alive because availability of th
Explain the Parathyroid Glands The parathyroid and thyroid glands are neighbours in the neck. You would realize that parathyroid glands are the small glands that lie behind the
A stone seems to weigh less in water Weigh a large stone on a pair of kitchen scales. Put a loop of heavy string around the stone and weigh it again suspended in a pail of wate
Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
three adaptations that help humans have differential survivability, and three adaptations that help humans have differential fecundity
Metamorphic rocks Igneous and sedimentary rocks that have been altered from their previous condition through the combined action of heat and pressure below Earth's surface are
Explain somatic mutation theory of ageing Random mutation makes the cells inefficient. An increase in the number of mefficient cells in an organ impairs their functioning. Rand
what are the subdivisions of ecology
if we drink liquid nitrogen then what happen
To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an
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