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THE NERVOUS SYSTEM (Neurotransmitters (Transmit messages, Between neurons…
THE NERVOUS SYSTEM
Composed of Neurons
SENSORY
Transmit signals to the CNS
From skin or organs
Unipolar
INTERNEURONS
Always in the CNS
Relieves and sends
Transfer
MOTOR
To body’s muscles and glands
Multipolar
transmit signals away from the CNS
nerve impulses
rest
Inside of the axon
More sodium outside
More potassium inside
Imbalance of ions
active
Information down an axon
Sodium and potassium channels
Depolarization
Repolarization
Neurotransmitters
Transmit messages
Between neurons of neurons-muscles
Happens in a synaptic gap
Drugs interfere with neurotransmitters
includes 2 systems
Peripheral nervous system (PNS)
rest of the nerves
connects CNS with the rest of the body
Central nervous system (CNS)
Spinal cord
Brain
It is in charge of sending electrical and chemical signals to and from the nerve cells
Controls organs, body’s reactions, other systems and all your body