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Central Nervous System CNS
Peripheral Nervous System
Neurons
Safety
Odds & Ends
100
What are the two parts of the CNS?
The Brain and the Spine
100
What is the Peripheral Nervous System?
Nerves and Nuerons that connect the CNS to the rest of the body.
100
What are the 3 parts of a neuron
Dendrite Axon Cell body/nucleus
100
How does the body protect the brain
The skull surrounds the brain
100
How are impulses carried from one nerve cell to another?
chemicals carry impulses across the synapse
200
What is the function of the CNS?
Receive information Respond to information Maintain homeostasis
200
Why is a spinal nerve like a 2-lane highway?
Impulses travel in two directions (to and from the CNS)
200
What carries impulses to the cell body
dendrite
200
What condition is caused by a bruise to the brain?
concussion
200
At what age do humans gain brain cells?
All brain cells are present at birth. No new ones are added
300
What is the spinal cord protected by?
Vertebrae
300
What are the two groups of the PNS called?
Somatic Autonomic
300
The type of neuron which causes a muscle to contract
motor neuron
300
How can the brain be protected during sports activities
wear a helmut
300
What part of the brain controls logic, language and mathmatical thinking?
The left hemisphere
400
What part of the CNS carries nerve messages between the body and the brain?
The spinal cord
400
What is the response which occurs without conscious control?
automatic response
400
A neuron which picks up stimuli and converts it into a nerve impulse
sensory neuron
400
How do reflexes protect the body from injury?
reflexes allow the body to respond quickly to danger
400
Which part of the brain controls creativity?
The Right Hemisphere
500
Name the 3 main parts of the human brain
cerebrum cerebellum brainstem
500
The response which happens using voluntary actions
somatic
500
The type of neuron which carries nerve impulses from one neuron to another
interneuron
500
What might spinal cord injuries cause?
paralysis - loss of movement in some part of the body
500
Approximately how many neurons does the brain contain?
100 billion