UMKC Neurophysiology II Questions With Complete
Solutions
(Graded/Action) potential: can either be excitatory
depolarizations or inhibitory hyperpolarizations Correct
Answer graded
(Graded/Action) potential: depolarizations only Correct
Answer action
(Graded/Action) potential: generated in response to a stimulus
Correct Answer graded
(Graded/Action) potential: generated in response to a
suprathreshold graded potential Correct Answer action
(Graded/Action) potential: Lose strength as it travels Correct
Answer graded
(Graded/Action) potential: occurs along the axons of neurons,
nerve impulse Correct Answer action
(Graded/Action) potential: strength is not proportional to
stimulus Correct Answer action
(Graded/Action) potential: strength is proportional to stimulus
Correct Answer graded
(Graded/Action) potential: synaptic potentials, receptor
potentials, pacemaker potentials Correct Answer graded
, (Graded/Action) potential: travel long distances Correct
Answer action
(Graded/Action) potential: travel short distances Correct
Answer graded
a slight decrease in K+ that reduces membrane excitability,
hyperpolarizes membrane further from threshold Correct
Answer hypokalemia
A slight increase in K+ that increases membrane excitability,
depolarizes vM moving closer to threshold; if concentrations are
> 6mM, then there is a reduction in membrane excitability,
depolarization still occurs but v-gated Na+ channel become
inactivated Correct Answer hyperkalemia
A synapse can occur between a neuron and what 3 things?
Correct Answer neuron, muscle cell, gland cell
Activation of Na+ channels occur via a _____________
feedback loop Correct Answer positive
AP's propagate faster in (myelinated/unmyelinated) axons
Correct Answer myelinated
causes new sections of a membrane to depolarize Correct
Answer local current flow
channel that opens/closes and inactivates super quick during an
AP Correct Answer Na+
Solutions
(Graded/Action) potential: can either be excitatory
depolarizations or inhibitory hyperpolarizations Correct
Answer graded
(Graded/Action) potential: depolarizations only Correct
Answer action
(Graded/Action) potential: generated in response to a stimulus
Correct Answer graded
(Graded/Action) potential: generated in response to a
suprathreshold graded potential Correct Answer action
(Graded/Action) potential: Lose strength as it travels Correct
Answer graded
(Graded/Action) potential: occurs along the axons of neurons,
nerve impulse Correct Answer action
(Graded/Action) potential: strength is not proportional to
stimulus Correct Answer action
(Graded/Action) potential: strength is proportional to stimulus
Correct Answer graded
(Graded/Action) potential: synaptic potentials, receptor
potentials, pacemaker potentials Correct Answer graded
, (Graded/Action) potential: travel long distances Correct
Answer action
(Graded/Action) potential: travel short distances Correct
Answer graded
a slight decrease in K+ that reduces membrane excitability,
hyperpolarizes membrane further from threshold Correct
Answer hypokalemia
A slight increase in K+ that increases membrane excitability,
depolarizes vM moving closer to threshold; if concentrations are
> 6mM, then there is a reduction in membrane excitability,
depolarization still occurs but v-gated Na+ channel become
inactivated Correct Answer hyperkalemia
A synapse can occur between a neuron and what 3 things?
Correct Answer neuron, muscle cell, gland cell
Activation of Na+ channels occur via a _____________
feedback loop Correct Answer positive
AP's propagate faster in (myelinated/unmyelinated) axons
Correct Answer myelinated
causes new sections of a membrane to depolarize Correct
Answer local current flow
channel that opens/closes and inactivates super quick during an
AP Correct Answer Na+
