CNS
What is the CNS composed of?
Brain and spinal cord.
What is the PNS composed of
All the nerves outside of the CNS.
What is the first step of brain signaling?
Neurons are “off” but ready to send a message.
What is the function of CNS?
Processes information and is the control center of the body.
Connects the CNS to limbs and organs and serves as a communication relay.
What happens when a neuron sends a message?
An electrical signal travels down the axon.
What protects the brain and spinal cord?
Spine, skull, and cerebrospinal fluid.
What are the three main steps in how the nervous system works?
Sensory input, integration, and motor output.
What are neurotransmitters?
Chemicals that carry messages across a synapse.
What does the brain do with the information it gets?
It processes it and decides how the body should respond.
What happens during sensory input?
Receptors detect changes in the environment.
What is a synapse?
A tiny gap between two neurons.
What does the CNS do in integration?
Processes the sensory data and determines the appropriate response.
What do the neurons do in the last step of brain signaling?
The neuron receives the chemicals and starts its own signal, passing the message along.
What happens after a neurotransmitter crosses a synapse?
They start a new signal in the next neuron.