What causes synaptic facilitation? Release of greater than usual number of synap
ID: 277429 • Letter: W
Question
What causes synaptic facilitation?
Release of greater than usual number of synaptic vesicles
Activation of synaptotagmin by means of phosphorylation
Buildup of Ca2+ in the presynaptic terminal
Release of synaptic vesicles loaded with extra neurotransmitter
Which process differentiates long-term from short-term sensitization?
Changes in the synapses between the sensory and motor neurons
Synaptic transmission between the facilitatory and sensory neurons
Changes in gene expression
Production of cAMP
Which condition(s) must be met to induce LTP?
Glutamate must be released from the presynaptic terminal
Glutamate must open the postsynaptic AMPA receptors
The postsynaptic membrane must be depolarized for a period of time
Mg2+ block must be expelled from NMDA receptors to allow Ca2+ influx
All of the above
Which observation would demonstrate the spike timing-dependent plasticity of synapses?
Whether or not LTP occurs is dependent on the specific temporal pattern of action potentials.
Switching the relative timing of action potential and EPSP by as little as 20 ms can switch the response from LTD to LTP, or vice-versa.
LTP occurs whenever an action potential precedes an EPSP.
LTD occurs whenever an action potential follows an EPSP.
How would an increase in external Ca2+ concentration affect synaptic depression?
It would increase the rate of depression.
It would have no effect on depression
It would reduce the rate of depression.
It would decrease the rate of neurotransmitter release and induce depression.
LTP represents a lasting increase in the size of EPSP
following a high-frequency train of stimuli.
that is restricted to the cortex
following a low-frequency train of stimuli
following a single stimulus
Release of greater than usual number of synaptic vesicles
Activation of synaptotagmin by means of phosphorylation
Buildup of Ca2+ in the presynaptic terminal
Release of synaptic vesicles loaded with extra neurotransmitter
Which process differentiates long-term from short-term sensitization?
Changes in the synapses between the sensory and motor neurons
Synaptic transmission between the facilitatory and sensory neurons
Changes in gene expression
Production of cAMP
Which condition(s) must be met to induce LTP?
Glutamate must be released from the presynaptic terminal
Glutamate must open the postsynaptic AMPA receptors
The postsynaptic membrane must be depolarized for a period of time
Mg2+ block must be expelled from NMDA receptors to allow Ca2+ influx
All of the above
Which observation would demonstrate the spike timing-dependent plasticity of synapses?
Whether or not LTP occurs is dependent on the specific temporal pattern of action potentials.
Switching the relative timing of action potential and EPSP by as little as 20 ms can switch the response from LTD to LTP, or vice-versa.
LTP occurs whenever an action potential precedes an EPSP.
LTD occurs whenever an action potential follows an EPSP.
How would an increase in external Ca2+ concentration affect synaptic depression?
It would increase the rate of depression.
It would have no effect on depression
It would reduce the rate of depression.
It would decrease the rate of neurotransmitter release and induce depression.
LTP represents a lasting increase in the size of EPSP
following a high-frequency train of stimuli.
that is restricted to the cortex
following a low-frequency train of stimuli
following a single stimulus
Explanation / Answer
Ans 1 : Build up of Ca2+ in the presynaptic terminal.
The synaptic facilitation occurs when the more than one action potentials reach the presynaptic terminal simultaneously. This causes an increase in the strength of stimulus at the terminal. More than the usual amount of neurotransmitter is released and the calcium ions are build up at the presynaptic terminal.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.