CLASS X BIOLOGY

Revision of chapter Life processes and Control and Coordination  . Doubts from the topics were taken up in the class.

CHAPTER 7 – CONTROL & COORDINATION KEY CONCEPTS & GIST OF THE LESSON ˜  Coordination-The working together of various organs of the body of an organism in a proper       manner to produce appropriate reaction to a stimulus is called coordination.    Example : Withdrawal of hand on touching a hot object. Control and Coordination in Animals It is brought about in all animals with the help of two main systems ( a ) Nervous System ( b ) Endocrine System Nervous System Parts of the Nervous system – (i) Brain (ii) Spinal cord (iii) Nerves (Neurons) Functions ( i ) To receive the information from environment ( ii ) To receive the information from various body parts.      (Stimuli ® Response) ( iii ) To act accordingly through muscles and glands. Stimulus : Any change in environment to which the organisms respond and react is called stimulus. E.g., touching a hot plate. Response : The reaction of our body to a stimulus. E.g. withdrawal of our hand o

Topic: Control and coordination Parts of brain and functions performed by them, protection of neural tissue, motion produced by neural tissue, comparision of neural and endocrine communication, endocrine and exocrine gland, main endocrine glands and their functions, feedback mechanism, coordination in plants- tropic and nastic movements, types of tropic movements, types of plant hormones, their functions, 

Life Processes: Excretion in Humans, Structure of nephron, formation of urine,dialysis, excretion in plants. Control and coordination: Nervous system, structure of neuron, transmission of information- nerve impulse and chemical message (neurotransmitter) synapse, types of response- voluntary, involuntary, reflex, reflex arc.