A nerve fibre can transmit impulses at the rate of:
A.5 metre per second
B.10 metre per second
C.100 metre per second
D.130 metre per second
Category: Nervous System Physiology Mcqs
Nervous system in organisms, in general, serve to:
A.Regulate and control the activities of different organs in the body
B.Link and coordinate the activities of various organs to ensure the integrity of the animal
C.Help the organs to maintain unity with the environment
D.All of these functions
Which of these is not the example of reflex actions:
A.Blinking of eyes
B.Sneezing
C.Swallowing
D.Catching a prey
On cutting off the parasympathetic supply to heart completely, the heart will:
A.Stop beating
B.Beat rapidly
C.Beat slowly
D.Beat but without nervous control
Synapse is a gap between adjacent:
A.Nerve cells
B.Muscle cells
C.Muscle fibres
D.Nerve cell and other cell
Routing of signals to one of several alternative circuits, amplification of certain signals while reduction of others, integration of signals from diffuse sources, learning etc, are performed by:
A.Inter-neurons
B.Synapses
C.Neuromuscular junctions
D.None of these
Under the condition of disturbed electrical equivalence between axoplasm and ECF the conduction of nerve impulse will be:
A.Normal
B.Abnormal
C.Unaffected
D.None of these
An impulse will travel through a nerve fibre only if the membrane becomes more permeable to ions of:
A.Chloride
B.Potassium
C.Calcium
D.Sodium
At the point of stimulation the depolarization is of axolemma brought about by:
A.Increased permeability for sodium ions resulting in influx of Na+ from ECF into cytoplasm
B.Decreased permeability for sodium ions resulting in outflux of these from cytoplasm into ECF
C.Influx of K+ ions from ECF into cytoplasm
D.None of these processes
Which of these is a correct statement:
A.All of the neurons are excitable
B.All of the neurons can transmit impulses across their membrane
C.Transmission of nerve impulses is always unidirectional
D.All of these statements
