Test 3 Flashcards
What is React
Sending out motor commands
What Processes information
Inter neurons
What are Neurons purpose
Send and receive signals
Neuroglia is defined as?
Cells that support
What is included in the Central nervous system
Brain spinal cord
What is included in the Peripheral nervous system
Sensory, nerves
Afferent division- sensory info., begins with receptors
Efferent division- motor info., terminates with effectors
Enteric nervous system includes?
Digestive system
Somatic nervous system includes?
Skeletal muscle
Autonomic nervous system is identified as?
And includes two effects
In charge of sending things that we don’t have control of.
Sympathetic- stimulating effect
Parasympathetic- relaxing effect
Axon is defined as?
Connector tubes on a cell that sends and delivers messages
Telodendria is defined as?
Synaptic terminals
Nissl bodies is defined as?
Concentration of ribosomes, gray matter
Dendrites purpose is to?
Receive information from other neurons
What are Inter neurons involved in?
Involved in higher functions
Unipolar is defined as?
Only acts as sensory neurons
Glial cells
Supporting cells that make up half the volume of the nervous system
Astrocytes
Maintain blood-brain barrier
Oligodendrocytes
Myelinate CNS axons
Microglia
Removes cell debris by phagocytosis
Ependymal cells
Line ventricles, produce and regulate CSF
Myelin
Speeds up action potential
Satellite cells
Maintenance
Schwann cells
Form myelin sheaths around peripheral axons
Graded potential
Temporary localized stimulus
Action potential
An electrical signal
Threshold
Value at which action potential is sent
Propagation
Action potential moving down the cell
Depolarization
Extreme positive
Repolarization
Extreme negative
Continuous propagation
Continuous, sense there is no myelin
Saltatory propagation
Jumps from node to node
Area of polarity reversal
Nodes that jump from myelin sheath
Presynaptic cell
Neurons that sends messages
Postsynaptic cell
Cell that receives message