The Nervous System Flashcards
Anterior
Front of the body ventral
Posterior
Back of the body dorsal
Superior
Above and towards head
Inferior
Below and towards feet
Name the two nervous systems
Central nervous system and peripheral nervous system
What is the central nervous system
Brain and spinal chord
Two different types of peripheral nervous system
Autonomic nervous system and somatic nervous system
What’s the autonomic nervous system
Communicates with internal organs and glands
What’s the somatic nervous system
Communicates with sense organs and voluntary muscles
Two types of the autonomic nervous system
The sympathetic division (arousing) and the parasympathetic division ( calming)
What are the two types of somatic nervous system
Sensory (afferent) and motor (efferent)
What does myelin sheath do
Speeds up reaction
Action potential
The flow of charge along a neutral axon or nerve impulse
Saltatory conduction
The use of na+ ions to create the flow of charge
How to increase the speed of action potential
Size ( smaller diameter) faster
Conductance poorly insulated axons leak
Membrane capacitance - current used up charging the membrane)
