NEW
Font size
WorksheetsIMSPQ P2 - Neurophysiology
Total questions: 20
Worksheet time: 10mins
The points where specific neuron-to-neuron communication occurs is called …
Junction
Terminal
Synapse
Interneuron
Neuronal chain
The first part of the axon that is known as the initial segment and arises from the soma is called …
Initiator segment
Axon hillock
Soma
Dendrite
Hamberg's segment
Motor proteins that are required for axonal transport are … and …
Glial cell and pyramidal cell
Purkinje cell and motoneuron
Kinesin and dynein
Motor protein and astrocyte
Cholinergic and muscarinic
In the CNS, myelin is formed by the …, whereas in the PNS … form myelin
Schwann cell and oligodendrocytes
Oligodendrocytes and schwann cell
Astrocyte and satellite cell
Satellite cell and astrocyte
Schwann cell and satellite cell
Tetrodotoxin (TTX), one of the most potent poisons known, specifically blocks … channel
Na+
K+
Ca2+
Cl-
Mg2+
Action potential appears to "jump" from one node of Ranvier to the next. This process is called …
Fast conduction
Saltatory conduction
Myelination
Accomodation
Termination
What's the type of the fiber in postganglionic postganglionic fibers, especially sympathetic??
E
D
C
B
A
Acetylcholine is synthesized from … and … by the enzyme …
Acetyl CoA, choline, choline acetyltransferase
Acetyl CoA, choline, acetylcholinesterase
Acyl CoA, choline, choline acyltransferase
Acyl CoA, choline, choline acyltransferase
Acetyl CoA, choline, acetylcholinesterase
NO functions as a signal transduction molecule by regulating …, the enzyme that produces … from …
Guanylyl cyclase, GTP, cGMP
Guanylyl cyclase, cGMP, GTP
Adenylyl cyclase, GTP, cGMP
Adenylyl cyclase, cGMP, GTP
Phospholipase C, ADP, ATP
Binding of GABA to GABAB receptor activates a heterotrimeric GTP binding protein, which leads to activation of … channels
Na+
K+
Ca2+
Cl-
Mg2+
Nucleus gracilis receives information from the … part of the body
Upper
Lower
Lateral
Central
Back
Aδ axons signal conduction is … than C fibers
Faster
Slower
Equals
Stronger
Weaker
When the heart muscle becomes ischemic, pain is felt in the chest wall and left arm. This phenomenon is called …
False receptive
Accomodation
Referred pain
False negative
False positive
Neurons have a resting potential that typically is around … mV
70
-70
-85
85
65
When a nerve is depolarized very slowly, the normal threshold may be passed without the firing of an action potential; this phenomenon is called …
Accomodation
Conduction
Hyperdepolarization
Tetanus
Freezing nerve
Regions of the CNS containing high concentrations of axon pathways are called …
Gray matter
White matter
Pia mater
Lateral horn
Interneuron
The injection of negative charge makes the membrane potential more negative, and this change in potential is called …
Repolarization
Hyperpolarization
Depolarization
Hyperdepolarization
Polarization
In the resting state, the activation gate of Na+ channel is … and the inactivation gate is …
Open, close
Close, open
Open, open
Close, close
Half open, half close
… is defined as the weakest stimulus that can be reliably detected
Isoelectric
Resting potential
Stimulus threshold
Spike potential
Bare minimum
Mention at least 2 stimulus parameters that can be encoded!!
Sensory modality, frequency, duration
Intensity, frequency, duration
Location, intensity, frequency
All of the above
None of the above
