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NERVOUS SYSTEM - Coggle Diagram
NERVOUS SYSTEM
EYE
RETINA
OPTIC NERVE
SCLERA
IRIS
CILIARY MUSCLES AND SUSPENSORY LIGAMENTS
STRUCTURES IN A REFLEX ARC
SENSORY NEURONE
Sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS
SYNAPSE
Junction between two neurons that allows a signal to pass between them
RELAY NEURONE
Connect sensory neurons to motor neurons
MOTOR NEURONE
Sends electrical impulses to an effector
CEREBRAL CORTEX
Consciousness
Intelligence
Language
Memory
STRUCTURE OF THE NERVOUS SYSTEM
Information from receptors passes along cells (neurones) as electrical impulses to the central nervous system (CNS).
The CNS is the brain and spinal cord.
The CNS coordinates the response of effectors which may be muscles contracting or glands secreting hormones.
HOW NEUROSCIENTISTS HAVE BEEN ABLE TO MAP THE REGIONS OF THE BRAIN TO PARTICULAR FUNCTIONS
Studying patients with brain damage
Electrically stimulating different parts of the brain
Using MRI scanning techniques
REFLEX ACTIONS
Automatic ( they do not involve the conscious part of the brain)
Rapid; protect from harm
BRAIN
Controls complex behaviour
It is made of billions of interconnected neurones and has different regions that carry out different functions
CEREBELLUM
Coordination of muscular activity
MEDULLA
Unconscious activities
Heartbeat
Breathing
The nervous system enables humans to react to their surroundings and coordinate their behaviour