Organization
This division includes the brain and spinal cord.
What is the Central Nervous System?
These structures receive signals from other neurons.
What are dendrites?
These support cells help protect and maintain neurons.
What are neuroglial cells (glia)?
The electrical signal that travels down an axon.
What is an action potential?
The junction between two neurons.
What is a synapse?
This division includes nerves outside the brain and spinal cord.
What is the Peripheral Nervous System?
This part of the neuron contains the nucleus.
What is the cell body (soma)?
These glial cells produce myelin in the central nervous system.
What are oligodendrocytes?
The electrical charge difference across the neuron membrane.
What is resting potential?
Chemicals that transmit signals between neurons.
What are neurotransmitters?
The nervous system helps maintain this stable internal condition.
What is homeostasis?
This long fiber carries impulses away from the neuron.
What is the axon?
These glial cells produce myelin in the peripheral nervous system.
What are Schwann cells?
This occurs when sodium ions move into the neuron.
What is depolarization?
Neurotransmitters are released from this part of the neuron.
What is the axon terminal?
This nervous system division controls voluntary skeletal muscle movement.
What is the Somatic Nervous System?
This insulating covering speeds up nerve impulses.
What is the myelin sheath?
These glial cells connect neurons to blood vessels.
What are astrocytes?
This ion leaves the neuron during repolarization.
What is potassium?
These structures on the next neuron receive neurotransmitters.
What are receptors?
These are the two branches of the autonomic nervous system.
What are the sympathetic and parasympathetic divisions?
These gaps in the myelin sheath help impulses travel faster.
What are the Nodes of Ranvier?
These glial cells act as the immune defense of the nervous system.
What are microglia?
These signals travel faster in neurons that have this insulation.
What is myelin?
These neurotransmitters increase the chance of a nerve impulse.
What are excitatory neurotransmitters?