*UPDATED* For 2022-23 Boards Exam
SHOBHIT NIRWAN's
DESIGNED
CONTROL AND
COORDINATION
NOTES
, Kuch Kaam Ki Baat (K3B) :
SOME IMPORTANT TERMS
Stimuli: The factors which bring response or change in the environment example
Light, Heat, Cold, Sound, Smell, Touch etc.
Coordination: The working together of various organs of living organisms in a
systematic, controlled way to produce a proper response to stimuli is known as
coordination.
Hormones: These are chemical messengers which are secreted by endocrine
glands. They coordinate the movements in plants.
Receptors: These are special tips of some nerve cells that detect information
from the environment. These are located in our sense organs. Eyes, ear, skin ,nose
and tongue.
Nervous System
It is the control system of the body.
STRUCTURE OF NEURON
Cell body (cyton)- It is a broadly rounded part of the neuron that contains a
central nucleus, cytoplasm, etc.
Dendrites- They are the branched process of the Cell body that receives and
transmits stimulus.
Axon- It conducts impulses away from the cell body and it is the longest part of
the neuron. It is covered with a protective sheath called the myelin sheath.
Nerve ending- They are fine branches like the termination of neurons and
transmit electrical impulses to another neuron.
FUNCTIONS OF NEURON
It regulates voluntary and involuntary movements of the human body
It collects information from outside through sense organs and interprets it
accordingly.
It helps in reasoning and thinking.
It controls reflex actions.
It enables us to remember things.
SHOBHIT NIRWAN's
DESIGNED
CONTROL AND
COORDINATION
NOTES
, Kuch Kaam Ki Baat (K3B) :
SOME IMPORTANT TERMS
Stimuli: The factors which bring response or change in the environment example
Light, Heat, Cold, Sound, Smell, Touch etc.
Coordination: The working together of various organs of living organisms in a
systematic, controlled way to produce a proper response to stimuli is known as
coordination.
Hormones: These are chemical messengers which are secreted by endocrine
glands. They coordinate the movements in plants.
Receptors: These are special tips of some nerve cells that detect information
from the environment. These are located in our sense organs. Eyes, ear, skin ,nose
and tongue.
Nervous System
It is the control system of the body.
STRUCTURE OF NEURON
Cell body (cyton)- It is a broadly rounded part of the neuron that contains a
central nucleus, cytoplasm, etc.
Dendrites- They are the branched process of the Cell body that receives and
transmits stimulus.
Axon- It conducts impulses away from the cell body and it is the longest part of
the neuron. It is covered with a protective sheath called the myelin sheath.
Nerve ending- They are fine branches like the termination of neurons and
transmit electrical impulses to another neuron.
FUNCTIONS OF NEURON
It regulates voluntary and involuntary movements of the human body
It collects information from outside through sense organs and interprets it
accordingly.
It helps in reasoning and thinking.
It controls reflex actions.
It enables us to remember things.
