WorksheetsRefractory/Propag Dr. Jones Neuro Exam 1
Total questions: 8
Worksheet time: 24mins
Which of the following is due to to inactivated Na+ channels and NO STIMULUS?
Absolute refractory period
Relative refractory period
Which of the following causes NO stimulus of any strength will lead to a new action potential?
continue outward diffusion of K+
inactivated Na+ channels
continue inward diffusion of K+
activated Na+ channels
Which of the following may elicit an action potential with a stronger stimulus in the Relative refractory period?
inactivated Na+ channels
continued outward diffusion of K+
activated Na+ channels
continued inward diffusion of K+
How can the number of action potentials can be increased?
decreasing the strength in stimulus
increasing the strength in stimulus
inhibiting the strength in stimulus
stopping the strength in stimulus
In which region the action potentials are initiated where we reach the threshold of depolarization in the initial segment?
dendrites
axon hillock
nucleus
soma
Where does the slow continuous conduction occur?
unmyelinated axons
myelinated axons
unmyelinated dendrites
myelinated dendrites
cell body
Which of the following statements is TRUE about fast Saltatory Conduction?
unmyelinated axons increases conduction velocity
it takes more time due to the unmyelinated axons
myelination and larger diameter axon increases conduction velocity
myelination decreases conduction velocity
myelination and smaller diameter axon increases conduction velocity
A 16 years old patient shows to the emergency department due to having fatigue, dysphagia and ataxia. The patient has a clinical history of Multiple Sclerosis diagnosed two years ago. This autoimmune disease affects the brain and spinal cord in the CNS.
Which of the following is occurring in this patient within this autoimmune disease?
increased conduction velocity due to Oligodendrocytes produced by myelin being attacked
decreased conduction velocity due to Oligodendrocytes produced by myelin being attacked
decreased conduction velocity due to Schwann cells produced by myelin being attacked
increased conduction velocity due to Astrocytes produced by myelin being attacked
