Transcript Powerpoint Review

The Nervous System
CNS
Central Nervous System
Central Nervous System
• Brain
• Spinal Cord
PNS
Peripheral Nervous System
Peripheral Nervous System
Nerves
Parts of the brain
Cerebrum
Cerebellum
Brain Stem
Thalamus
Hypothalamus
Cerebrum
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•
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Learning
Memory
Thinking
Seeing
Hearing
Smelling
Tasting
Cerebrum
Cerebellum
• Balance
Cerebellum
Brain Stem
• Connects brain with the spinal cord
•Controls
–Breathing
–Heartbeat
–Digestion
Brain Stem
Thalamus
• Sends messages to the correct part of the
brain and body
• Controls the traffic
Hypothalamus
• Controls body temperature
Neurons
• Combine to form nerves
• Carry messages to and from the brain
Parts of a Neuron
Dendrite
Cell Body
Nucleus
Axon
Synapses
Dendrite
Bushy part of the neuron that receives the
messages
Cell Body
main part of the neuron that is
surrounded by the dendrite
Nucleus
• Contains the DNA of the cell
Axon
long narrow part of the neuron which
carries the message
Synapses
Gap between
neurons
Types of Nerves
Motor
Cause your muscles to move
Types of Nerves
Sensory
Brings messages from your eyes, ears
nose, mouth and skin to your brain
Types of Messages
Electric
carried through the axon of the neuron
Types of Messages
Chemicalmessages that travel between the
gap (synapse) of each neuron
Chemical produced by the axon carries the
message
Reflex
• an action you do without thinking.
• They help protect your body
• Like pulling your hand from a hot object,
blinking or sneezing