Studied by 2 people
What are the 2 roles of the CNS
-Allows humans to react to their surroundings
-Co-ordinates their behaviour
What does a motor neurone do?
Carry nerve impulses away from CNS
What does a relay neurone do?
Carries nerve impulses within the CNS
What does a sensory neurone do?
Carry nerve impulses to the CNS
What is the chain of components from a stimulus to a response?
Stimulus →Receptor →CNS →Effector → Response
What does the cerebral cortex control?
-Motor function
-Decision making
What does the medulla control?
-Reflexes/unconscious actions (breathing)
What does the cerebrum control?
Balance
What is A?
Cerebrum
What is B?
Cerebellum
What is C?
Medulla
Why are neurons insulated by a myelin sheath?
-To speed up impulses
-Prevent short-circuiting
What is a synapse?
A gap between 2 neurones which allows chemical neurotransmitters to diffuse across the gap
What is A?
Pre-synaptic membrane
What is B?
Post-synaptic membrane
What is C?
A vesicle
What D?
Neurotransmitters
What is a reflex action?
An automatic response to a stimulus
What does a reflex action not involve?
The brain
What does a reflex action do?
Protect body from harm
How fast is a reflex action in comparison to a regular response?
Much more rapid
What is the sequence of components in a reflex action?
Stimulus → Spinal cord → Effector → Response
Note 
Flashcard (24)