Nervous Flashcards
Composed of the brain and spinal chord
Central Nervous System
Central command system where all communications and actions occur in the body
Central Nervous System
Composed of the nerves that branch off from the spinal cord and innervate the body
Peripheral Nervous System
Sends signals by the brain to the targeted locations
Peripheral Nervous System
Contain nucleus and organelles
Cell Body
Short, branch-like extensions that generate electrical impulses
Dendrites
Long extension that transmits signals to other neurons
Axon
Basic unit of nervous system
Neuron (Nerve Cell)
Composed of cell body dendrites and an axon
Neuron
White fatty surface that covers axon and helps increase the speed of nerve impulses
Myelin Sheath
Space between the terminal buttons of one neuron and the dendrites of another neuron
Synapse
End of Axon that release neurotransmitters called axon ____
Terminals
Neurons that send messages to the central nervous system
Afferent/Sensory Neurons
Neurons that send messages to the muscles
Efferent/Motor Neurons
Involuntary actions such as heart rate, digestion, and respiration
Autonomic Nervous System
