Division of Nervous System
The Nervous system is divided into what?
CNS (Central Nervous System)
PNS (peripheral Nervous System)
Are Astrocytes in the PNS or CNS?
CNS
Where is threshold reached in order to have an AP?
Axon Hillock
What is an electrical synapse?
Cells joined by gap functions
Connection of cells allow AP to travel unchanged from cell to cell
Allows groups of cells to function together
Name a neurotransmitter, their class, and effect
Ach, Ach, muscle contraction
What does Efferent stand for? Afferent?
Efferent-Motor
Afferent-Sensory
What is the function of Oligodendrocytes?
Myelinate cells
Depolarization Occurs when when the membrane potential moves in which direction?
Positive
What is the Chemical Synapse?
Cells separated by synaptic cleft
AP must change form to cross cleft- Neurotransmitters used
Allows modulation and change of signal in postsynaptic neurons
Inhibitory neurons cause
IPSP's
Inhibitory post synaptic potential
The Autonomic Nervous system is divided into which two categories?
Parasympathetic, Sympathetic
What is the function of Microglia
immune defense against invading organisms
During The Beginning Of Repolarization Voltage Gated Channels...
Open
What is EPSP? What does it do?
Excitatory Post Synaptic Potential
Bring post synaptic neuron closer to threshold
How do inotropic channels open?
1. neurotransmitter binds to receptor site on inotropic receptor
2. Receptor channels open
The Autonomic and Somatic Nervous System are subdivisions of what?
Motor Division
What are Glial Cells?
Supporting cells in the Nervous System
What is absolute refractory period?
Nothing can produce another AP at this time
Neurotransmitters are released from where?
Pre synaptic neuron
What are the three steps to stop synaptic transmission?
1. enzyme degradation
2. Diffusion
3. Reuptake
Nerves are apart of which dividion of the Nervous System?
Peripheral Nervous System
What is the difference between Oligodendrocytes and Schwann Cells?
Oligodendrocytes are found in the CNS whereas Schwann Cells are found in the PNS
What detrmines the speed of an action potential?
Myelination and diameter
How does calcium enter the presynaptic neuron?
Through voltage gated calcium channels
What is a divergent pathway?
Neuronal circuit where one neuron sends signals to multiple neurons