Chapter 7 :Control and co-ordination - PPT, Science, Class 10, CBSE, NCERT PDF Download

 Page 1


CHAPTER - 7CONTROL  AND  
COORDINATION
Class :- X
Subject :- Science
Name of Teacher :- Mr Ashok V Kurup
Page 2


CHAPTER - 7CONTROL  AND  
COORDINATION
Class :- X
Subject :- Science
Name of Teacher :- Mr Ashok V Kurup
1a) Stimuli :-
The changes in the environment to which living 
organisms respond are called stimuli. Eg :- heat, cold, 
sound, smell, taste, touch, pressure, gravity, water etc. 
Living organisms respond to stimuli in the form of body 
movements.
b) Coordination :-
For a proper response to a stimulus many organs in the 
body should work together. The working together of 
various organs in an organism to produce a proper 
response to a stimulus is called coordination.
i) In animals control and co ordination is done by the 
nervous system and endocrine system. 
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.
Page 3


CHAPTER - 7CONTROL  AND  
COORDINATION
Class :- X
Subject :- Science
Name of Teacher :- Mr Ashok V Kurup
1a) Stimuli :-
The changes in the environment to which living 
organisms respond are called stimuli. Eg :- heat, cold, 
sound, smell, taste, touch, pressure, gravity, water etc. 
Living organisms respond to stimuli in the form of body 
movements.
b) Coordination :-
For a proper response to a stimulus many organs in the 
body should work together. The working together of 
various organs in an organism to produce a proper 
response to a stimulus is called coordination.
i) In animals control and co ordination is done by the 
nervous system and endocrine system. 
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.
2) Coordination in animals :-
In animals control and co ordination is done by the nervous system 
and endocrine system. 
The nervous system consists of the brain, spinal cord and nerves.
a) Receptors :- are the sense organs which receive the stimuli and 
pass the message to the brain or spinal cord through the sensory 
nerves.
Eg :- Photoreceptors in the eyes to detect light. 
Phonoreceptors in the ears to detect sound.
Olfactory receptors in the nose to detect smell.
Gustatory receptors in the tongue to detect taste.
Tangoreceptors in the skin to detect touch.
b) Effectors :- are the muscles and glands which respond to the 
information from the brain and spinal cord through the motor nerves.
c) Sensory nerves :- are nerves which carry information from the 
receptors (sense organs) to the brain and spinal cord.
d) Motor nerves :- are nerves which carry information from the brain 
and spinal cord to the effectors (muscles and glands).
Page 4


CHAPTER - 7CONTROL  AND  
COORDINATION
Class :- X
Subject :- Science
Name of Teacher :- Mr Ashok V Kurup
1a) Stimuli :-
The changes in the environment to which living 
organisms respond are called stimuli. Eg :- heat, cold, 
sound, smell, taste, touch, pressure, gravity, water etc. 
Living organisms respond to stimuli in the form of body 
movements.
b) Coordination :-
For a proper response to a stimulus many organs in the 
body should work together. The working together of 
various organs in an organism to produce a proper 
response to a stimulus is called coordination.
i) In animals control and co ordination is done by the 
nervous system and endocrine system. 
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.
2) Coordination in animals :-
In animals control and co ordination is done by the nervous system 
and endocrine system. 
The nervous system consists of the brain, spinal cord and nerves.
a) Receptors :- are the sense organs which receive the stimuli and 
pass the message to the brain or spinal cord through the sensory 
nerves.
Eg :- Photoreceptors in the eyes to detect light. 
Phonoreceptors in the ears to detect sound.
Olfactory receptors in the nose to detect smell.
Gustatory receptors in the tongue to detect taste.
Tangoreceptors in the skin to detect touch.
b) Effectors :- are the muscles and glands which respond to the 
information from the brain and spinal cord through the motor nerves.
c) Sensory nerves :- are nerves which carry information from the 
receptors (sense organs) to the brain and spinal cord.
d) Motor nerves :- are nerves which carry information from the brain 
and spinal cord to the effectors (muscles and glands).
HUMAN NERVOUS SYSTEM
Page 5


CHAPTER - 7CONTROL  AND  
COORDINATION
Class :- X
Subject :- Science
Name of Teacher :- Mr Ashok V Kurup
1a) Stimuli :-
The changes in the environment to which living 
organisms respond are called stimuli. Eg :- heat, cold, 
sound, smell, taste, touch, pressure, gravity, water etc. 
Living organisms respond to stimuli in the form of body 
movements.
b) Coordination :-
For a proper response to a stimulus many organs in the 
body should work together. The working together of 
various organs in an organism to produce a proper 
response to a stimulus is called coordination.
i) In animals control and co ordination is done by the 
nervous system and endocrine system. 
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.
2) Coordination in animals :-
In animals control and co ordination is done by the nervous system 
and endocrine system. 
The nervous system consists of the brain, spinal cord and nerves.
a) Receptors :- are the sense organs which receive the stimuli and 
pass the message to the brain or spinal cord through the sensory 
nerves.
Eg :- Photoreceptors in the eyes to detect light. 
Phonoreceptors in the ears to detect sound.
Olfactory receptors in the nose to detect smell.
Gustatory receptors in the tongue to detect taste.
Tangoreceptors in the skin to detect touch.
b) Effectors :- are the muscles and glands which respond to the 
information from the brain and spinal cord through the motor nerves.
c) Sensory nerves :- are nerves which carry information from the 
receptors (sense organs) to the brain and spinal cord.
d) Motor nerves :- are nerves which carry information from the brain 
and spinal cord to the effectors (muscles and glands).
HUMAN NERVOUS SYSTEM
HUMAN NERVOUS SYSTEM