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Health Test 1
Terms in this set (20)
The nervous system is made up of the;
Brain, spinal cord, nerves
4 functions in the nervous system:
Process information,Store information,Controls Voluntary Movements, and Controls involuntary movements and actions
The brain makes up ?% of the body weight
The brain uses ?% of oxygen inhaled
The Brain and spinal cord make up the
central nervous system (CNS).
The Brain is: connected to the
spinal cord, which runs from the neck to the hip area.
The spinal cord: carries
nerve messages between the brain and the body.
The nerves that connect the CNS to the rest of the body are called the
Peripheral Nervous System (PNS)
The Autonomic Nervous System Controls:
Our life support systems that we don't
Sending Messages In The Brain: Neurons
Neurons are a
Neurons are responsible for
sending messages within
the nervous system; thinking, feeling and moving.
Structure of a Neuron: 3 Parts:
Cell Body,Axon, Dendrites
Neurons: You have ?? billion neurons in
your Brain, which if stretched out would reach 30 thousand miles.
Neurons are nerve cells that contain
pieces of information that need to be transmitted to another neuron so that your
body can properly function.
Impulses may travel as fast as
_360_ feet per
second along an axon.
Caused by: sudden impact, shaking, or spinning, disrupts normal pathways in Brain
Nerve impulse passes from dendrite
Goes through neuron body
Travels down axon
Triggers the release of neurotransmitters
Neurotransmitters are how the brain sends
?? have been identified, but little is known
Chemical signal: Chemicals allow signals to go from one ?? to another by "jumping the gap (synapse)".
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