25-1~25-2 Flashcards
Peripheral nervous system
All parts parts of the nervous system aside from the brain and spinal cord; connects all parts of the body to the central nervous system
Central nervous system
Brain and spinal chord; processes information that comes from the peripheral nervous system
Neuron
A nerve cell that specializes in transferring messages in the form of fast-moving electrical energy called impulses
Cell body
The large region in the center of a neuron
Dendrites
Short, branched extensions of a cell that allows it to recieve impulses from thousands of other cells
Axon
Elongated extensions of neurons with branches that allow information to pass to other cells
Axon terminal
Tip of the axon
Sensory neurons
Neurons that gather information about what is happening in and around your body
Receptors
Specialized nerve endings that detect changes inside and outside the body
Motor neurons
Neurons that send impulses from the brain and spinal cord to other systems
Nerve
A collection of axons bundled together with blood vessels and connective tissue; most have axons of sensory and motor neurons
Somatic nervous system
Consciously controlled movements (voluntary)
Auto nomadic nervous system
Involuntary actions
Brain
A mass of nerve tissue that is the main control center of the nervous system
Three main parts of the brain
Cerebrum, cerebellum, medulla
