The nervous system
the network of nerve cells that transmit nerve impulses across the body.
The nervous system splits in to...
CNS central nervous system
PNS peripheral nervous system
Functions of the nervous system
1) process and respond to stimuli information
2) co-ordinate working of different organs and cells
CNS (central nervous system)
consists of the brain and spinal cord
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, The brain in the CNS
-centre of consciousness
-outer layer = cerebral cortex
cerebral cortex
the outer layer of the brain, distinguishes between humans and animals
The spinal cord in CNS
-extension from the brain
-responsible for reflexes
Function of the spine
-passes messages to + from brain
-connects nerves to PNS
PNS (peripheral nervous system)
the neurons that connect the CNS to the rest of the body
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, PNS function
transmits messages to and from the nervous system
The PNS is divided into..
The Autonomic nervous system ANS
The Somatic nervous system SNS
Autonomic nervous system (ANS)
governs vital functions e.g. breathing
Somatic Nervous System (SNS)
controls muscle movement
receives info from sensory receptors
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, The autonomic nervous system is divided into...
sympathetic and parasympathetic
sympathetic nervous system
a set of nerves that prepares the body for action in challenging or threatening
situations
parasympathetic nervous system
a set of nerves that helps the body return to a normal resting state
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the network of nerve cells that transmit nerve impulses across the body.
The nervous system splits in to...
CNS central nervous system
PNS peripheral nervous system
Functions of the nervous system
1) process and respond to stimuli information
2) co-ordinate working of different organs and cells
CNS (central nervous system)
consists of the brain and spinal cord
https://quizlet.com/gb/593537249/flash-cards/?funnelUUID=0351de1f-5a0c-44e9-8b10-8ea05610a0fd 03/03/2026, 8 48 pm
Page 3 of 37
:
, The brain in the CNS
-centre of consciousness
-outer layer = cerebral cortex
cerebral cortex
the outer layer of the brain, distinguishes between humans and animals
The spinal cord in CNS
-extension from the brain
-responsible for reflexes
Function of the spine
-passes messages to + from brain
-connects nerves to PNS
PNS (peripheral nervous system)
the neurons that connect the CNS to the rest of the body
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Page 4 of 37
:
, PNS function
transmits messages to and from the nervous system
The PNS is divided into..
The Autonomic nervous system ANS
The Somatic nervous system SNS
Autonomic nervous system (ANS)
governs vital functions e.g. breathing
Somatic Nervous System (SNS)
controls muscle movement
receives info from sensory receptors
https://quizlet.com/gb/593537249/flash-cards/?funnelUUID=0351de1f-5a0c-44e9-8b10-8ea05610a0fd 03/03/2026, 8 48 pm
Page 5 of 37
:
, The autonomic nervous system is divided into...
sympathetic and parasympathetic
sympathetic nervous system
a set of nerves that prepares the body for action in challenging or threatening
situations
parasympathetic nervous system
a set of nerves that helps the body return to a normal resting state
https://quizlet.com/gb/593537249/flash-cards/?funnelUUID=0351de1f-5a0c-44e9-8b10-8ea05610a0fd 03/03/2026, 8 48 pm
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