3+4
Neurophysiology Challenge
Test your knowledge of neurophysiology with our engaging quiz! This quiz covers essential concepts related to resting membrane potentials, action potentials, and synaptic transmission.
Key Features:
- Multiple choice questions
- Interactive learning experience
- Designed for students and enthusiasts of neuroscience
Resting membrane potential equals
-65
-90
-70
+70
Types of channels can open and close, regulating permeability of the cell membrane:
Leak channels
Gated channels
Unmyelinated neurons transfer signals faster than myelinated
False
True
If a membrane potential changed from -70 to +100 what will we have
Depoalrization
Repolarization
Hyperepolarisation
The opening voltage-gated potassium channels is responsible for which part of the action potential?
Depolarization of the membrane
Repolarization of the membrane
Hyperpolarization of the membrane
Refractory period
Threshold stimuli are those which are strong enough to:
Close voltage-gated Na+channels.
Open voltage-gated K+ channels.
Close voltage-gated K + channels.
Open voltage-gated Na+ channels.
Salutatory conduction of the action potential Takes place in myelinated axons.
True
False
A signal at an inhibitory synapses
Increase the Na gates .
Decrease the threshold level
Opening K gates
Which of the following happen during muscle contraction
Decrease I band width
Increase A band width
Increase I band width
26-When voltage-gated K+ channels open during action potential of a nerve The nerve depolarizes
True
False
Action potential
Happens only in excitable tissues
Propagation in one direction in neuronal cells
Its an all or non potential
All of the above
None of the above
At equilibrium K+ move from inside to the outside of the cell
False
True
Inhibitory postsynaptic potential (IPSP) is produced by increased permeability of postsynaptic membrane to
K+
NA+
CA +2
Glucose
Threshold: -the point at which there is tremendous increase in Na+permeability
True
False
Graded potential: -Magnitude varies with the strength of the stimuli causing them
True
False
If the membrane potential of this cell is −80 millivolts, the driving force is greatest for which ion?
K+
Na+
Ca2+
Cl-
Spatial summation
Adding two different excitation on one junction
Adding three different excitation on one junction
Adding two different excitation on two junction
Adding thee different excitation on two junction
The unequal distribution of sodium and potassium between the ICF and ECF Result from sodium being pumped out and potassium being pumped into the cells
True
False
Relative refractory period:
Is a period during which second action potential cannot be produced no matter how strong is the stimulus.
Is a period during which second action potential can be produced only by an exceptionally strong triggering.
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