Organization of the Nervous System
Neurons & Neuroglia
Neuron Structure
Neuron Function
Reflexes
100

A major subdivision of the nervous system that interprets incoming information and issues orders.

What is the Central Nervous System (CNS)

100
These star-shaped cells anchor neurons and work with the blood brain barrier to protect the brain.
What is an astrocyte?
100
These neurons have one axon and one dendrite.
What is a bipolar neuron?
100
The ability to respond to a stimulus.
What is irritability?
100
Neurons that carry impulses to the central nervous system.
What are afferent or sensory neurons?
200
Subdivision of the peripheral nervous system that controls voluntary activities such as activation of skeletal muscles.
What is the somatic nervous system?
200
These cells appear to be involved in nutrition and support of neurons.
What are glia?
200
This structure increases the speed of the impulse and is NOT found in all neurons.
What is myelin?
200

Describe the purpose of the myelin sheath in regards to nueron function

impulses travel faster when fibers have a myelin sheath

200
In a reflex arc muscles and glands are referred to as _____.
What is an effector?
300
A major subdivision of the nervous system that detects stimuli and transmits information to the central nervous system.
What is the peripheral nervous system?
300
These cells act as phagocytes to remove debris.
What are microglia?
300
This structure is responsible for releasing neurotransmitters.
What is the axon terminal?
300
Occurs when acetylcholine binds to the receptor site a membrane protein and sodium ions rush into the cell.
What is depolarization?
300
The absolute minimum number of neurons which can be involved in a reflex are is/are _______.
What is two?
400
Nervous system subdivision that is composed of the cranial and spinal nerves.
What is the peripheral nervous system?
400
These cells produce myelin in the PNS.
What are Schwann cells?
400
The gap between two communicating neurons.
What is the synaptic cleft or synapse?
400
A self-propagated transmission of the depolarization wave along the neuron membrane.
What is an action potential?
400
A rapid, predictable and involuntary response to a stimuli.
What is reflex?
500
Subdivision of the peripheral nervous system that regulates the activity of the heart, smooth muscles and glands.
What is autonomic nervous system?
500
These cells produce cerebral spinal fluid.
What are ependymal cells?
500
A collection of nerve cell bodies inside the central nervous system.
What are nuclei?
500
This specialized protein uses ATP to move sodium out of the cell and potassium into the cell.
What is a sodium-potassium pump?
500
A neuron with a cell body located in the central nervous system that connects sensory and motor neurons.
What is an association or interneuron?
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