Nervous System
What are the two main cells types found in the nervous system
Neurons and neuralgia
What part of the neuron receives signal from other neuron?
Dendrites
Which neuroglia form Myelin in the CNS
Oligodenrocytes
What is the resting membrane potential of a neuron?
-70 mv
What is the junction
Synapse
What are the three overlapping functions of the nervous system?
Sensory input, Integration, motor output
What is the conducting region of a neuron?
Axon
Which Neuroglia form myelin in the PNS
Schwann cells
At what potential is threshold typically reached?
-55 mv
What are the two main types of the synapse based on location
Axodendritic and Axosomatic
What is included in the CNS?
Brain and spinal cord
What are the two types of movement along the axon?
Anterograde and retrograde
What are the gaps between myelin sheaths called
Nodes of ranvier
During depolarization which ion rushes into the cell
Sodium Na
What determines which neurotransmitter is released
Stimulation frequency
What is the term for a group of neurons cell bodies in the PNS?
Ganglia
What is the part of a neuron the receives information?
Dendrites
What type of matter contains nonmyelinated fibers
Gray matter
During repolarization which ion exits the cell
Potassium
What kind of potential does a neurotransmitter produce on the post synaptic membrane
Graded potential
What is the term for a group of cell bodies in the CNS?
Nuclei
Why can’t neurons divide?
They are amitotic
What is the function of myelin
Increases the speed of impulse conduction
What type of conduction occurs along myelinated axons
Saltatory conduction
Name two major classes of neurotransmitters
Acetylcholine, biogenic amines, amino acids, peptides, purines, gases, or lipids