When an electric shock is given to a pithed frog it:
A.Shows contraction of leg muscles
B.Blinks its eyes
C.Puts out its tongue
D.Shows no response
Category: Nervous System Physiology Mcqs
Which of these is not a reflex action:
A.Caughing
B.Yawning
C.Sneezing
D.None of these
During conduction of an impulse, electric potential on inside of axolemma changes from:
A.Negative to positive and remain positive
B.Negative to positive and remain negative
C.Positive to negative and remain positive
D.Positive to positive and remain negative
Saltatory transmission of nerve impulse occurs in the:
A.Myelinated neurons
B.Non-myelinated neurons
C.Both of these neurons
D.None of these neurons
Which of these illustrates a reflex are:
A.Brain ? spinal cord ? muscles
B.Receptor ? spinal cord ? muscle
C.Spinal cord ? receptor ? effector
D.None of these
Acetylcholine is responsible for transmission of nerve impulses through:
A.Cytons
B.Dendrites
C.Axons
D.Synapses
Which of these neurons secrete neurohormones:
A.Afferent
B.Efferent
C.Internununcial
D.Neurosecretory
Transmission in myelinated fibres occurs:
A.At about 50 times faster rate than non-myelinated ones
B.At about 50 times slower rate than non-myelinated ones
C.At the same rate as in the non-myelinated ones
D.At about 100 times slower rate than non-myelinated ones
Which of these are not neurohormones:
A.Acetylcholine, epinephrine, norepinephrine, somatostatin
B.Dopamine, serotonin, histamine, substance-P, sympathin
C.Thyroxine, gastrin, secretin, enterokrinin, cholecystokinin
D.All of these
The negative charges over complex organic molecules are neutralized by:
A.Potassium ions
B.Sodium ions
C.Chloride ions
D.None of these
