Flashcards in Ch.13 Nervous System Deck (12):
Basic unit of the nervous system
Glial cell (neuroglia cell)
Support and nourish neurons. Growth factors, make up myelin sheath from Schwann cells
Sensory vs. motor
Sensory - takes nerve signals from a sensory receptor to the cns
Motor- takes nerve impulses away from the cns to an effector - muscle fiber, organ, or gland
Is the portion of a neuron that conducts nerve impulses
Are short extensions that receive signals from sensory receptors to other neurons
Cell that surrounds a fiber of a peripheral nerve and forms the myelin sheath
Reestablishes the resting potential by pumping Na+ out and K+ in the neuron.
Electrochemical changes that takes place across the axomembrane; the nerve impulses. - process of conduction that occurs In the axon of neurons. Nerve is stimulated
Nerve cannot be stimulated right after action potential; sodium channels closed and cannot be reopened
Transmission across a synapse is carried out by molecules- chemical signal at synapse
The region of close proximity between each terminals and either dendrite or cell body of another neurons.