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Physiology of the Nervous System II
Physiology of the nervous system continuation
10
Physiology
Undergraduate 2
12/11/2011

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Term
Synapse
Definition
Functional juction that mediates info transfer from one neuron to the next or from neuron to effector cells
Term
Presynaptic Neuron
Definition
Neuron propogating impulses towards the synapse. (sender)
Term
Post synaptic Neuron
Definition
the neuron producing the electrical signal in response to the arriving nerve impulse. (receiver)
Term
Types of synapse
Definition
electrical and chemical
Term
Three ways in which neurotransmitters can be terminated
Definition
Degradation by enzymes, reuptake, and diffusion
Term
Ionotropic receptors
Definition
Neurotransmitters bind to open ion channels. Receptor site and ion channels are in the same protein.
Term
NT acting indirectly
Definition
promote broarder longer lasting effects through second-messenger molecules. Receptor site is in one membrane protein and ion channel is in another.
Term
Metabotropic Receptors
Definition
known to bring about widespread metabolic changes in NT acting indirectly
Term
In spinal motor neurons, the transition from graded potential to AP takes place at the
Definition
Axon Hillock
Term
In sensory neuron AP is generated by
Definition
receptor potential at the end of the peripheral axonal process
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