Vocab
Composed of the brain and the spinal cord
CNS
The_____ is composed of three parts: the cell body, dendrites, and the axon.
neuron
Number 1 on the diagram is the…
cell body
This is a diagram of a….
neuron
90% of snow is trapped ______ making it an excellent insulator
air
Neurons that carry impulses toward the CNS are called
Afferent or Sensory
A _____ is made of bundles of axons located in the PNS
Nerve
Number 2 on the diagram is the….
nucleus
Two major divisions of the nervous system are the…
CNS and PNS
No shoes, no shirt, no…..
service
Part of the nervous system that controls involuntary functions like breathing.
Autonomic nervous system
A small electrical difference across the cell membrane is called the_____ membrane potential.
resting
Number 3 on the diagram is the…
dendrite
The place where a neuron communicates
synapse
In dog math 1 scoop of food plus 1 scoop of food equals….
zero scoops of food
Cells that help support and protect neurons.
Neuroglia
Means “body” and controls our body’s movements
Somatic
Number 4 on the diagram is the ______ of Ranvier
node
Excites a neuron, triggers an electrical signal called action potential
Stimulus
Your feet were once….
cute little baby feets
When the membrane potential becomes less and less negative, and then positive its called….
Depolarization
__________ carry the signals across the synaptic cleft.
Neurotransmitters
Number 5 on the diagram is the….
Schwann cell
The PNS consists of ______ nerves that extend from the brain and spinal nerves that extend from the spinal cord
cranial
The adult human brain weighs about how many pounds?
3