4. The activity of all these muscles and cells is co-ordinated by
a highly organised mass of tissues which form the Central
Nervous System (Brain).
THE SYSTEM THAT DEALS WITH STIMULUS AND
RESPONSE….NERVOUS SYSTEM.
Stimulus: A
change in the
environment
(external or
internal) that
is detected by
a receptor.
Response: A
change in an
organism (an
action) resulting
from a stimulus.
5. It is divided into:
1. Central Nervous System
– Brain
– Spinal cord
2. Peripheral Nervous System
A. Somatic nervous system
– Cranial nerves
– Spinal nerves
B. Autonomic Nervous System
– Parasympathetic NS
– Sympathetic NS
10. STRUCTURE OF
NEURON
Cell body contains nucleus and
cytoplasm with Nissl’s granules.
It has two types of processes-
dendrons and axon.
Short processes that bring
information to the cell body
Long process that carry information
away from the cell body.
Branches of axon with knobs that
connect with dendrite of next
neuron.
31. FUNCTION OF NEURON- CONDUCT NERVEIMPULSES
Nerve impulse moves from
axon of one neuron to dendrite
of the other
Reason- vesicles containing neurotransmitters are present
only in the terminal region or ends of the axon.
33. • MYELINATED Neurons
with axons having myelin
sheath.
• Forms the white matter
• NON MYELINATED-
Neurons with axons that do not have
myelin sheath.
• Forms the grey matter.
37. It is divided into:
1. Central Nervous
System
– Brain
– Spinal cord
2. Peripheral Nervous
System
A. Somatic nervous
system
– Cranial nerves
– Spinal nerves
B. Autonomic Nervous
System
– Parasympathetic NS
– Sympathetic NS