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define specific defence mechanismin the section on white blood cells we learnt that whenever a germ or infection enters our body the wbcs snap to
a space explorer is moving through space far from any star or planet he notices a large rock taken as a specimen from an alien planet floating around
explain interferoninterferon interferes with viruses hence the name and is produced by most cells in the body interferons like antibodies and
define the complement systemthe complement system is a series ofproteins there are only a handful of proteins in the complement system and they are
when throwing a baseball a force is exerted by the hand on the balla is this force a contact force or a field force contact forceb throwing a ball
explain causes of fever - immune systemwe have seen that due to injury cut or bite the inflammatory response develop and this is localized or
explain pus formationonce a neutrophil finds a foreign particle or a bacterium it will engulf it releasing enzymes hydrogen peroxide and other
a small sports car collides head on with a massive trucka which vehicle will experience the maximum magnitude force the car the truck or
observing root hairsstudy the root hairs with a hand lens and view how they are
how to grow root hairshairs can simply be seen on the roots of mustard seed grown on a damp flannel seeds placed on an earthenware dish standing in a
what are the functions of lymphocytesthe lymphocytes handle most of the bacterial and viral infection that we get in fact lymphocytes are directly
q if the net force acting on an object is in the positive x-direction the object moves only in the positive x-directionit is not true the object will
q if a single force acts on an object the object acceleratesyse it is definately
q if an object isnt moving no external force acts on it no it is always not true there
define the lymphocytesthey are agranulocytes the nucleus occupies approximately the entire cell they vary in size from 6- 18 mm diameter sometimes
iron panthis is useful for many experiments in chemistry the lid of a preserving jar is looped with galvanized wire the free end of the wire is
q it is possible to have motion in the absence of a force yes it is
define the functions of the macrophagesthe macrophages1 phagocytose microorganisms and inert particles2 secrete il-1 interlukin i tnf tumor
define the fixed type of macrophagesthe fixed types are located permanently in certain organs which include lungs - alveolar macrophages liver -
when the economy experiences a downfall the government knows exactly which policies will spur an economic recoveryoften policymakers fail to take the
a metal ring stand and ringsa useful ring stand and rings can be made from a flat curtain rod and the fixtures which clamp over electricbulbs to
the government uses monetary and fiscal policy to mitigate the effects of economic
define the type of macrophagesmacrophages are of two typesa fixed types andb wandering
can a contour map explain a cause and effect relationship among three
can you explain that a wave through the origin always has a slope of one or