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In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as :
Define reflex action. With the help of a flow chart show the path of a reflex action such as sneezing.
The correct sequence of events occurring when we touch a hot object unconsciously :
Define a reflex arc. Why have reflex arcs evolved in animals ? Trace the sequence of events which occur, when you suddenly touch a hot object.
Name the part of nervous system which helps in communication between the central nervous system and other parts of the body. What are the two components of this system ?
Leaves of chhui-mui plant begin to fold up and droop in response to a stimulus. Name the stimulus and write the cause for such a rapid movement. Is there any growth involved in the movement ?
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