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a weather housechanges in the amount of water vapour are in the atmosphere can be indicated by variation in tension in a few strands of human hair or
explain the dichromates or mild colour blindnessa dichromate individual possesses only two cone pigments lack of the red pigment called protanopia
a hair hygrometerthis device will enable you to read the relative humidity directly without the use of tablesprocure a few human hairs about 30 cm
explain the colour blindnessnormal individuals possess three cone pigments viz red green and blue which are referred to as tri-chromates colour
define the factors that are affecting colour perceptionthe two most important factors which influence colour perception include temperature and
explain brain or detector - mechanism of colour perceptionthe fibre identification of colour takes place in the brain if any of these four
explain the organ of perception - pre-requisites of colour perceptionthese are the receptors receptors as you may already know are the rods and cones
a wet and dry bulb hygrometer get two inexpensive thermometers and check them in warm water at dissimilar temperatures to see that they agree join
explain light source - pre-requisites of colour perception no colour may be detected by the eyes or by an instrument in the dark ie in the
define the sympathetic nervous systemthe sympathetic component of the autonomic nervous system is concerned with in- creasing the level of arousal
define the categories of autonomic nervous systemautonomic nervous system is divided into 2 parts - sympathetic and parasympathetic sympathetic is a
explain the actions of autonomic nervous system ansthe actions of the autonomic nervous system are largely involuntary in contrast to those of the
a rain gaugemount your wind speed indicator in a place that is exposed to the wind from all directions 4 a rain gauge it is simple to make a easy
explain the autonomic nervous system ansthe autonomic or involuntary part of nervous system controls the functions of the body carried out
explain the posterior nerve rootposterior nerve root consists of sensory nerve fibres having cell bodies in root ganglions and enter the spinal cord
explain the somatosensory systemthe somatosensory system consists of 12 pairs of cranial nerves and 31 pairs of spinal nerves all our conscious
chemical effects of airwash a small wad of steel wool in gasoline benzene or carbon tetrachloride car- bona to delete any grease squeeze it out and
explain the sensory and the motor neuronsthe peripheral nervous system consists of1 sensory neurons running from stimulus receptors that inform
define the peripheral nervous systemthe peripheral nervous system or pns is a part of the nervous system and consists of the nerves and neurons that
explain the vasomotor center - feature of medullathe vasomotor center is found in medulla it controls diameter of the blood vessels especially the
explain the sensory decussation - feature of medullasome of the sensory nerves ascending to the cerebrum from spinal cord cross from one side to the
explain the pyramids - feature of medullapyramids are the bulges of ventral surfaces where most of the lateral corticospinal tracts originating from
another balloon experimentstretch a rubber balloon over the neck of a little bottle place it in the receiver jar and delete some of the air with the
moving water by reducing air pressuresecure two small bottles fill single about half full of water and close it with a single-hole stopper carrying a
an experiment with a bottle and corktightly close a liitle bottle with a cork or rubber stopper place the bottle in the receiver and remove some of