The Nervous System

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What does the Nervous System enable humans to do?

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Information from passes along cells () as impulses to the central nervous system (the or ). The brain coordinates the .

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The cerebral cortex is concerned with consciousness, co-ordination and unconscious activities.

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The cerebellum is concerned mainly with the coordination of muscular activity.

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The medulla is concerned with unconscious activities such as heartbeat and breathing.

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Scientists have been able to map regions of the brain to paticular fuctions by studying patients with brain damage, ❌ different parts of the brain and using ❌ scanning techniques.

MRI

CAT

electrically stimulating

artificially stimulating

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( Reflex, Relay ) actions are ( automatic, quick, unconscious ) and rapid. They often involve ( sensory, impulse ), ( relay, reflex, pain ) and ( motor, movement ) neurones.

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In a simple reflex action such as pain-withdrawal reflex: (step 1)

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Reflex actions step 2:

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Simple reflex action part 3:

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Simple reflex action part 4:

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Effector include muscles and glands.

Stimulus

Receptor

Co-ordinator

Effector

Response

iGCSE Biology Quiz sobre The Nervous System, criado por phoebe.k543 em 28-04-2016.

The Nervous System

What does the Nervous System enable humans to do?

Information from passes along cells () as impulses to the central nervous system (the or ). The brain coordinates the .

The cerebral cortex is concerned with consciousness, co-ordination and unconscious activities.

The cerebellum is concerned mainly with the coordination of muscular activity.

The medulla is concerned with unconscious activities such as heartbeat and breathing.

Scientists have been able to map regions of the brain to paticular fuctions by studying patients with brain damage, ❌ different parts of the brain and using ❌ scanning techniques.

Reflex Relay( Reflex, Relay ) actions are automatic quick unconscious( automatic, quick, unconscious ) and rapid. They often involve sensory impulse( sensory, impulse ), relay reflex pain( relay, reflex, pain ) and motor movement( motor, movement ) neurones.

In a simple reflex action such as pain-withdrawal reflex: (step 1)

Reflex actions step 2:

Simple reflex action part 3:

Simple reflex action part 4:

Effector include muscles and glands.

( Reflex, Relay ) actions are ( automatic, quick, unconscious ) and rapid. They often involve ( sensory, impulse ), ( relay, reflex, pain ) and ( motor, movement ) neurones.